/* ===================================
   Style 7: Claymorphism Design
   Adapted for Price Comparison Project
   =================================== */

* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    /* Claymorphism Colors */
    --clay-bg-primary: #f5e6d3;
    --clay-bg-secondary: #e8d4b8;
    --clay-surface: #f0dcc8;
    --clay-accent: #d4a574;
    --clay-accent-dark: #c89860;
    --clay-text: #5a4a3a;
    --clay-text-light: #7a6a5a;
    --clay-success: #25d366;
    --clay-success-dark: #20b358;
    --clay-white: #ffffff;
    
    /* Shadows */
    --clay-shadow-raised: 20px 20px 40px rgba(0,0,0,0.15), -20px -20px 40px rgba(255,255,255,0.7);
    --clay-shadow-inset: inset 5px 5px 10px rgba(255,255,255,0.5), inset -5px -5px 10px rgba(0,0,0,0.1);
    --clay-shadow-pressed: inset 8px 8px 16px rgba(0,0,0,0.1), inset -8px -8px 16px rgba(255,255,255,0.7);
    --clay-shadow-button: 10px 10px 20px rgba(0,0,0,0.15), -10px -10px 20px rgba(255,255,255,0.7);
    --clay-shadow-hover: 15px 15px 30px rgba(0,0,0,0.2), -15px -15px 30px rgba(255,255,255,0.8);
}

body {
    font-family: 'Segoe UI', 'Microsoft JhengHei', '微軟正黑體', sans-serif;
    background: linear-gradient(135deg, var(--clay-bg-primary) 0%, var(--clay-bg-secondary) 100%);
    color: var(--clay-text);
    min-height: 100vh;
    padding: 0;
    line-height: 1.6;
    overflow-x: hidden;
}

/* Clay Surface Effect */
.clay {
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border-radius: 40px;
    box-shadow: var(--clay-shadow-raised), var(--clay-shadow-inset);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===================================
   Navigation Bar
   =================================== */
.navbar {
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    box-shadow: var(--clay-shadow-raised);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
    width: 100%;
    overflow: hidden;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    width: 100%;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* CSS Logo Design - Badge Style */
.logo-design {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 50px;
    width: 50px;
    position: relative;
}

.logo-badge {
    position: relative;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 50%, #c44569 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 
        0 4px 15px rgba(238, 90, 111, 0.4),
        inset 0 -2px 8px rgba(0, 0, 0, 0.2),
        inset 0 2px 8px rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
    overflow: hidden;
}

.logo-badge::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
    transform: rotate(45deg);
    animation: shine 3s infinite;
}

@keyframes shine {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.logo-currency {
    position: absolute;
    font-size: 1.8em;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.3);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
}

.logo-tag {
    position: relative;
    font-size: 1.4em;
    font-weight: 900;
    color: var(--clay-white);
    text-shadow: 
        2px 2px 4px rgba(0, 0, 0, 0.3),
        0 0 10px rgba(255, 255, 255, 0.2);
    z-index: 2;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.logo-design:hover .logo-badge {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 
        0 6px 25px rgba(238, 90, 111, 0.6),
        inset 0 -2px 8px rgba(0, 0, 0, 0.2),
        inset 0 2px 8px rgba(255, 255, 255, 0.3);
}

.logo-design:hover .logo-tag {
    animation: none;
    transform: scale(1.1);
}

.footer-logo-design {
    margin-bottom: 1rem;
    width: fit-content;
    height: 60px;
}

.footer-logo-design .logo-badge {
    width: 60px;
    height: 60px;
}

.footer-logo-design .logo-currency {
    font-size: 2.2em;
}

.footer-logo-design .logo-tag {
    font-size: 1.6em;
}

.nav-brand h1 {
    font-size: 1.5em;
    color: var(--clay-text);
    margin: 0;
    font-weight: 800;
    text-shadow: 2px 2px 4px rgba(255,255,255,0.5);
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 1.5rem;
    margin: 0;
    padding: 0;
}

.nav-link {
    text-decoration: none;
    color: var(--clay-text-light);
    font-weight: 700;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--clay-text);
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    box-shadow: var(--clay-shadow-pressed);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 3px;
    background-color: var(--clay-text);
    transition: all 0.3s;
    border-radius: 2px;
}

/* Mobile Menu Backdrop - REMOVED (no longer needed) */
/*
.mobile-menu-backdrop {
    display: none;
}
*/

/* Floating Action Button - Hidden on Desktop */
.fab-upload {
    display: none;
}

/* ===================================
   Buttons
   =================================== */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 25px;
    font-size: 1em;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    color: var(--clay-text);
    box-shadow: var(--clay-shadow-button);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--clay-shadow-hover);
}

.btn:active {
    transform: translateY(0);
    box-shadow: var(--clay-shadow-pressed);
}

.btn-primary {
    background: linear-gradient(145deg, var(--clay-accent), var(--clay-accent-dark));
    color: var(--clay-white);
    box-shadow: 15px 15px 30px rgba(0,0,0,0.2), -15px -15px 30px rgba(255,255,255,0.7), inset 3px 3px 6px rgba(255,255,255,0.3);
}

.btn-secondary {
    background: linear-gradient(145deg, var(--clay-success), var(--clay-success-dark));
    color: var(--clay-white);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875em;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.2em;
}

.category-btn {
    padding: 0.75rem 1.5rem;
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border: none;
    border-radius: 25px;
    color: var(--clay-text);
    font-weight: 700;
    cursor: pointer;
    box-shadow: var(--clay-shadow-button);
    transition: all 0.3s ease;
}

.category-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--clay-shadow-hover);
}

.category-btn.active {
    background: linear-gradient(145deg, var(--clay-accent), var(--clay-accent-dark));
    color: var(--clay-white);
    box-shadow: var(--clay-shadow-pressed);
}

/* ===================================
   Page Layout
   =================================== */
.page {
    display: none;
    padding: 2rem 0;
    min-height: calc(100vh - 80px);
}

.page.active {
    display: block;
}

.page-header {
    text-align: center;
    margin-bottom: 2rem;
    padding: 2rem;
}

.page-header h2 {
    font-size: 2.5em;
    margin-bottom: 0.5rem;
    color: var(--clay-text);
    font-weight: 800;
    text-shadow: 2px 2px 4px rgba(255,255,255,0.5);
}

.page-header p {
    color: var(--clay-text-light);
    font-size: 1.2em;
}

/* Mobile Page Navigation - Hidden on Desktop */
.mobile-page-nav {
    display: none;
}

/* ===================================
   Filters and Search
   =================================== */
.filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    flex: 1;
    min-width: 250px;
}

.search-box input {
    width: 100%;
    padding: 1rem 3rem 1rem 1.5rem;
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border: none;
    border-radius: 25px;
    color: var(--clay-text);
    font-size: 1em;
    box-shadow: var(--clay-shadow-pressed);
    transition: all 0.3s ease;
}

.search-box input:focus {
    outline: none;
    box-shadow: inset 10px 10px 20px rgba(0,0,0,0.15), inset -10px -10px 20px rgba(255,255,255,0.8);
}

.search-icon {
    position: absolute;
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.2em;
}

.category-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

/* ===================================
   Product & Promo Grids
   =================================== */
.products-grid,
.promotions-grid {
    display: block;
    margin-bottom: 2rem;
}

.promotions-grid {
    display: block;
}

/* Date Group Header */
.date-group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    margin: 2rem 0 1.5rem;
    background: linear-gradient(145deg, var(--clay-accent), var(--clay-accent-dark));
    border-radius: 25px;
    box-shadow: var(--clay-shadow-raised);
}

.date-group-header:first-child {
    margin-top: 0;
}

.date-title {
    font-size: 1.5em;
    font-weight: 800;
    color: var(--clay-white);
    margin: 0;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.product-count {
    font-size: 1em;
    font-weight: 600;
    color: var(--clay-white);
    background: rgba(255,255,255,0.2);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

/* Date Group Products Container */
.date-group-products {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

/* Date Group Promotions Container */
.date-group-promotions {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

/* ===================================
   Cards
   =================================== */
.card {
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border-radius: 30px;
    box-shadow: var(--clay-shadow-raised), var(--clay-shadow-inset);
    overflow: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 20px 20px 40px rgba(0,0,0,0.25), -20px -20px 40px rgba(255,255,255,0.8);
}

.card-image-wrapper {
    overflow: hidden;
    background: var(--clay-bg-secondary);
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    aspect-ratio: auto;
}

.card-image-wrapper.portrait {
    min-height: 280px;
}

.card-image-wrapper.landscape {
    min-height: 180px;
}

.card-image-wrapper.square {
    min-height: 220px;
}

.card-image {
    width: 100%;
    height: auto;
    max-height: 350px;
    object-fit: contain;
    object-position: center;
    background: transparent;
    border-radius: 20px;
    image-orientation: from-image;
}

.card:hover .card-image {
    transform: scale(1.05);
}

.card-thumbnail {
    height: 100px !important;
    max-width: 120px;
    margin: 10px auto 0;
    display: block;
    border-radius: 15px;
    object-fit: contain;
    background: var(--clay-bg-secondary);
}

.card-body {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-title {
    font-size: 1.2em;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--clay-text);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.retailer-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.4rem 1rem;
    background: linear-gradient(145deg, var(--clay-accent), var(--clay-accent-dark));
    color: var(--clay-white);
    border-radius: 20px;
    font-size: 0.875em;
    font-weight: 700;
    box-shadow: 8px 8px 16px rgba(0,0,0,0.15), -8px -8px 16px rgba(255,255,255,0.5);
}

.price {
    font-size: 2em;
    font-weight: 800;
    color: var(--clay-accent);
    text-shadow: 2px 2px 4px rgba(255,255,255,0.5);
}

.card-footer {
    padding-top: 0.75rem;
    margin-top: auto;
    font-size: 0.875em;
    color: var(--clay-text-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ===================================
   Promo Card Specific
   =================================== */
.promo-card .card-body {
    padding: 2rem;
}

/* Product Detail Image */
.product-detail-image {
    margin: 1.5rem 0;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    background: var(--clay-bg-secondary);
    border-radius: 20px;
    padding: 1rem;
}

.product-detail-image img {
    max-width: 100%;
    max-height: 500px;
    width: auto;
    height: auto;
    object-fit: contain;
    object-position: center;
    border-radius: 20px;
    box-shadow: var(--clay-shadow-button);
    cursor: pointer;
    image-orientation: from-image;
}

.product-detail-image img:hover {
    transform: scale(1.02);
}

.product-detail-info {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border-radius: 20px;
    box-shadow: var(--clay-shadow-pressed);
}

.promo-title {
    font-size: 1.5em;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--clay-text);
}

.countdown {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: linear-gradient(145deg, #f59e0b, #fb923c);
    color: var(--clay-white);
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.875em;
    box-shadow: 10px 10px 20px rgba(0,0,0,0.15), -10px -10px 20px rgba(255,255,255,0.5);
    margin-top: 0.5rem;
}

.promo-location {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-top: 1rem;
    padding: 1rem;
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border-radius: 20px;
    box-shadow: var(--clay-shadow-pressed);
}

.location-icon {
    font-size: 1.5em;
    color: var(--clay-accent);
}

.store-name {
    font-weight: 700;
    color: var(--clay-text);
    margin-bottom: 0.25rem;
}

.store-address {
    color: var(--clay-text-light);
    font-size: 0.875em;
    line-height: 1.5;
}

.promo-dates {
    margin-top: 1rem;
    padding-top: 1rem;
    font-size: 0.875em;
    color: var(--clay-text-light);
}

.promo-products-preview {
    margin-top: 1rem;
    padding: 1rem;
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border-radius: 20px;
    box-shadow: var(--clay-shadow-pressed);
}

.products-count {
    font-weight: 700;
    color: var(--clay-accent);
    margin-bottom: 0.5rem;
}

.total-savings {
    font-size: 1.5em;
    font-weight: 800;
    color: var(--clay-success);
    text-shadow: 2px 2px 4px rgba(255,255,255,0.5);
}

/* ===================================
   Modals
   =================================== */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    overflow-y: auto;
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Hide FAB when modal is open */
.modal.active ~ .fab-upload {
    display: none;
}

.modal-content {
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border-radius: 40px;
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: var(--clay-shadow-raised), var(--clay-shadow-inset);
}

.modal-large {
    max-width: 600px;
}

.modal-close {
    position: absolute;
    right: 1.5rem;
    top: 1.5rem;
    font-size: 2rem;
    font-weight: 300;
    color: var(--clay-text-light);
    cursor: pointer;
    line-height: 1;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    box-shadow: var(--clay-shadow-button);
    transition: all 0.3s ease;
}

.modal-close:hover {
    color: var(--clay-text);
    transform: rotate(90deg);
}

/* Promotion Detail Modal */
.promo-detail {
    padding: 1rem 0;
}

.promo-detail h2 {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--clay-text);
    font-size: 1.5em;
}

.promo-detail-gallery {
    margin-bottom: 1.5rem;
}

.gallery-main-image {
    width: 100%;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--clay-shadow-raised);
    margin-bottom: 1rem;
    background: var(--clay-bg-secondary);
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 150px;
}

.gallery-main-image img {
    max-width: 100%;
    max-height: 250px;
    width: auto;
    height: auto;
    object-fit: contain;
    object-position: center;
    border-radius: 15px;
    cursor: pointer;
    image-orientation: from-image;
}

.gallery-main-image img:hover {
    transform: scale(1.02);
}

.gallery-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.gallery-btn {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(145deg, var(--clay-accent), var(--clay-accent-dark));
    color: white;
    font-size: 1.3em;
    font-weight: 700;
    cursor: pointer;
    box-shadow: var(--clay-shadow-button);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gallery-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--clay-shadow-hover);
}

.gallery-counter {
    font-weight: 700;
    color: var(--clay-text);
    font-size: 0.9em;
}

.gallery-thumbnails {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: 0.5rem;
}

.gallery-thumb {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: 8px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.3s ease;
    box-shadow: var(--clay-shadow-button);
}

.gallery-thumb:hover {
    transform: scale(1.05);
}

.gallery-thumb.active {
    border-color: var(--clay-accent);
    box-shadow: var(--clay-shadow-hover);
}

.promo-detail-info {
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    padding: 1.5rem;
    border-radius: 20px;
    box-shadow: var(--clay-shadow-pressed);
}

.detail-row {
    margin-bottom: 1rem;
}

.detail-row:last-child {
    margin-bottom: 0;
}

.detail-row strong {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--clay-text);
}

.detail-row p {
    margin: 0;
    color: var(--clay-text-light);
    line-height: 1.6;
}

/* ===================================
   Forms
   =================================== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 700;
    color: var(--clay-text);
    font-size: 1.05em;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 1rem 1.5rem;
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border: none;
    border-radius: 25px;
    color: var(--clay-text);
    font-size: 1em;
    box-shadow: var(--clay-shadow-pressed);
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    box-shadow: inset 10px 10px 20px rgba(0,0,0,0.15), inset -10px -10px 20px rgba(255,255,255,0.8);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-select {
    cursor: pointer;
}

/* ===================================
   Loading & Notifications
   =================================== */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--clay-bg-primary) 0%, var(--clay-bg-secondary) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 3000;
}

.loading p {
    margin-top: 1.5rem;
    font-size: 1.2em;
    color: var(--clay-text);
    font-weight: 700;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 5px solid var(--clay-bg-secondary);
    border-top-color: var(--clay-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    box-shadow: var(--clay-shadow-raised);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 1rem 1.5rem;
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border-radius: 25px;
    box-shadow: var(--clay-shadow-raised);
    z-index: 2500;
    max-width: 300px;
    font-weight: 600;
    color: var(--clay-text);
    opacity: 0;
    transform: translateY(-20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
}

.notification.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

/* ===================================
   Empty State
   =================================== */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-state p {
    font-size: 1.2em;
    color: var(--clay-text-light);
    margin-bottom: 1.5rem;
}

/* ===================================
   Image Preview (Upload Form)
   =================================== */
.image-preview img,
#preview-image {
    image-orientation: from-image;
}

/* ===================================
   Image Lightbox
   =================================== */
.image-lightbox {
    display: none;
    position: fixed;
    z-index: 3000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
}

.image-lightbox.active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.lightbox-content {
    position: relative;
    max-width: 95%;
    max-height: 95%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-image {
    max-width: 100%;
    max-height: 90vh;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 20px;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
    position: absolute;
    top: -50px;
    right: 0;
    font-size: 2.5rem;
    color: white;
    cursor: pointer;
    background: rgba(0, 0, 0, 0.5);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.lightbox-close:hover {
    background: rgba(0, 0, 0, 0.8);
    transform: scale(1.1);
}

/* ===================================
   Animations
   =================================== */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeInUp 0.5s ease-out;
}

/* ===================================
   Responsive Design
   =================================== */

/* Tablet (768px - 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        padding: 0 1.5rem;
    }

    .products-grid,
    .promotions-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .page-header h2 {
        font-size: 2.2em;
    }

    .category-buttons {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 0.5rem;
    }

    .category-btn {
        white-space: nowrap;
        flex-shrink: 0;
    }
}

/* Mobile (max-width: 768px) */
@media (max-width: 768px) {
    body {
        padding: 0;
        font-size: 14px;
    }

    .container {
        padding: 0 1rem;
    }

    /* Navigation - Hide on mobile */
    .navbar {
        display: none;
    }

    /* Mobile Page Navigation Buttons */
    .mobile-page-nav {
        display: flex;
        gap: 0.5rem;
        margin-top: 1rem;
    }

    .mobile-page-btn {
        flex: 1;
        padding: 0.75rem 1rem;
        background: transparent;
        border: none;
        border-radius: 20px;
        color: var(--clay-text-light);
        font-size: 1em;
        font-weight: 700;
        text-align: center;
        cursor: pointer;
        transition: all 0.3s ease;
    }

    .mobile-page-btn:hover,
    .mobile-page-btn.active {
        color: var(--clay-text);
        background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
        box-shadow: var(--clay-shadow-pressed);
    }

    /* Floating Action Button for Mobile */
    .fab-upload {
        display: flex;
        position: fixed;
        bottom: 5px;
        left: 50%;
        transform: translateX(-50%);
        z-index: 1500;
        padding: 0.75rem 1.5rem;
        background: linear-gradient(145deg, var(--clay-accent), var(--clay-accent-dark));
        color: var(--clay-white);
        border: none;
        border-radius: 20px;
        font-size: 0.95em;
        font-weight: 700;
        box-shadow: 0 8px 20px rgba(0,0,0,0.3), 0 4px 10px rgba(212,165,116,0.4);
        cursor: pointer;
        align-items: center;
        gap: 0.5rem;
        transition: all 0.3s ease;
        animation: fabPulse 2s ease-in-out infinite;
    }

    .fab-upload:active {
        transform: translateX(-50%) scale(0.95);
    }

    @keyframes fabPulse {
        0%, 100% {
            box-shadow: 0 8px 20px rgba(0,0,0,0.3), 0 4px 10px rgba(212,165,116,0.4);
        }
        50% {
            box-shadow: 0 8px 25px rgba(0,0,0,0.4), 0 6px 15px rgba(212,165,116,0.6);
        }
    }

    /* Page Header */
    .page-header {
        padding: 1.5rem 0;
        margin-bottom: 1.5rem;
    }

    .page-header h2 {
        font-size: 1.8em;
        margin-bottom: 0.5rem;
    }

    .page-header p {
        font-size: 1em;
    }

    /* Filters */
    .filters {
        flex-direction: column;
        gap: 0.75rem;
        margin-bottom: 1.5rem;
    }

    .search-box {
        min-width: 100%;
    }

    .search-box input {
        padding: 0.875rem 3rem 0.875rem 1rem;
        font-size: 1em;
    }

    /* Category Buttons */
    .category-buttons {
        gap: 0.5rem;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 0.5rem;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .category-buttons::-webkit-scrollbar {
        display: none;
    }

    .category-btn {
        padding: 0.6rem 1rem;
        font-size: 0.875em;
        white-space: nowrap;
        flex-shrink: 0;
    }

    /* Date Group Headers */
    .date-group-header {
        padding: 1rem 1.25rem;
        margin: 1.5rem 0 1rem;
        border-radius: 20px;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .date-title {
        font-size: 1.2em;
    }

    .product-count {
        font-size: 0.9em;
        padding: 0.4rem 0.875rem;
    }

    /* Date Group Products - Horizontal Carousel */
    .date-group-products {
        display: flex;
        flex-direction: row;
        gap: 1rem;
        overflow-x: auto;
        overflow-y: hidden;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding: 0.5rem 0 1rem;
        margin-bottom: 1.5rem;
        position: relative;
    }

    .date-group-products::-webkit-scrollbar {
        display: none;
    }

    .date-group-products .card {
        flex: 0 0 280px;
        min-width: 280px;
        max-width: 280px;
        scroll-snap-align: start;
    }

    /* Date Group Promotions - Horizontal Carousel */
    .date-group-promotions {
        display: flex;
        flex-direction: row;
        gap: 1rem;
        overflow-x: auto;
        overflow-y: hidden;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding: 0.5rem 0 1rem;
        margin-bottom: 1.5rem;
        position: relative;
    }

    .date-group-promotions::-webkit-scrollbar {
        display: none;
    }

    .date-group-promotions .card {
        flex: 0 0 280px;
        min-width: 280px;
        max-width: 280px;
        scroll-snap-align: start;
    }

    /* Scroll indicator hint */
    .date-group-products::after,
    .date-group-promotions::after {
        content: '→';
        position: absolute;
        right: 0;
        top: 50%;
        transform: translateY(-50%);
        background: linear-gradient(to left, var(--clay-bg-primary) 60%, transparent);
        padding: 1rem 0.5rem 1rem 2rem;
        font-size: 1.5em;
        color: var(--clay-accent);
        pointer-events: none;
        opacity: 0.7;
        animation: scrollHint 2s ease-in-out infinite;
    }

    @keyframes scrollHint {
        0%, 100% { transform: translateY(-50%) translateX(0); }
        50% { transform: translateY(-50%) translateX(5px); }
    }

    /* Grids */
    .products-grid,
    .promotions-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    /* Cards */
    .card {
        border-radius: 20px;
    }

    .card-body {
        padding: 1rem;
    }

    .card-title {
        font-size: 1.1em;
    }

    .card-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .retailer-badge {
        font-size: 0.8em;
        padding: 0.3rem 0.75rem;
    }

    .price {
        font-size: 1.6em;
    }

    .card-footer {
        font-size: 0.8em;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }

    /* Buttons */
    .btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.95em;
    }

    .btn-lg {
        padding: 0.875rem 1.5rem;
        font-size: 1.1em;
    }

    .btn-sm {
        padding: 0.5rem 0.875rem;
        font-size: 0.85em;
    }

    /* Modals */
    .modal-content {
        width: 95%;
        max-width: 95%;
        padding: 1.25rem;
        border-radius: 25px;
        max-height: 90vh;
    }

    .modal-large {
        width: 95%;
        max-width: 95%;
    }

    .modal-close {
        right: 1rem;
        top: 1rem;
        width: 35px;
        height: 35px;
        font-size: 1.75rem;
    }

    /* Forms */
    .form-group {
        margin-bottom: 1.25rem;
    }

    .form-label {
        font-size: 1em;
        margin-bottom: 0.5rem;
    }

    .form-input,
    .form-select,
    .form-textarea {
        padding: 0.875rem 1.25rem;
        font-size: 1em;
    }

    /* Promo Cards */
    .promo-card .card-body {
        padding: 1.25rem;
    }

    .promo-title {
        font-size: 1.3em;
    }

    .countdown {
        padding: 0.6rem 1rem;
        font-size: 0.8em;
    }

    .promo-location {
        padding: 0.875rem;
        gap: 0.5rem;
    }

    .location-icon {
        font-size: 1.3em;
    }

    .store-name {
        font-size: 0.95em;
    }

    .store-address {
        font-size: 0.8em;
    }

    /* Empty State */
    .empty-state {
        padding: 3rem 1.5rem;
    }

    .empty-state p {
        font-size: 1.1em;
    }

    /* Notification - Compact Mobile Style */
    .notification {
        position: fixed;
        top: auto;
        bottom: 20px;
        right: 10px;
        left: 10px;
        max-width: calc(100% - 20px);
        padding: 0.75rem 1rem;
        font-size: 0.875em;
        border-radius: 15px;
        text-align: center;
        transform: translateY(100px);
    }

    .notification.show {
        transform: translateY(0);
    }

    /* Loading */
    .loading p {
        font-size: 1.1em;
    }

    .spinner {
        width: 50px;
        height: 50px;
        border-width: 4px;
    }

    /* Camera Modal */
    #camera-modal .modal-content {
        width: 100%;
        height: 100vh;
        max-height: 100vh;
        border-radius: 0;
        padding: 1rem;
    }

    .camera-preview {
        max-width: 100%;
        margin-bottom: 1rem;
    }

    .camera-controls {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .camera-controls .btn {
        flex: 1;
        min-width: calc(50% - 0.375rem);
    }

    #capture-btn {
        flex: 1 1 100%;
        min-width: 100%;
    }

    /* Comment Section */
    .comment-input-wrapper {
        flex-direction: column;
        gap: 0.75rem;
    }

    .comment-input {
        min-height: 80px;
        font-size: 0.9em;
    }

    .comment-submit-btn {
        width: 100%;
    }

    .comment-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .comment-actions {
        width: 100%;
        justify-content: flex-start;
        flex-wrap: wrap;
    }

    .btn-icon {
        font-size: 0.8em;
        padding: 0.25rem 0.5rem;
    }

    .replies {
        padding-left: 1rem;
        border-left-width: 2px;
    }

    .reply-item {
        padding: 0.6rem;
    }

    .reply-header .user-avatar {
        font-size: 1em;
    }

    .reply-content {
        font-size: 0.85em;
    }

    /* Image Lightbox */
    .lightbox-close {
        top: 10px;
        right: 10px;
        font-size: 2rem;
        background: rgba(0, 0, 0, 0.7);
        border-radius: 50%;
        width: 45px;
        height: 45px;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 0;
    }

    .lightbox-image {
        max-width: 95%;
        max-height: 85vh;
        border-radius: 15px;
    }

    .lightbox-content {
        max-width: 100%;
        max-height: 100%;
    }

    .product-detail-image {
        min-height: 150px;
        padding: 0.75rem;
    }

    .product-detail-image img {
        max-height: 350px;
    }
}

/* Small Mobile (max-width: 480px) */
@media (max-width: 480px) {
    .navbar {
        padding: 0.4rem 0;
    }

    .navbar .container {
        padding: 0 0.5rem;
        min-height: 48px;
    }

    .nav-brand h1 {
        font-size: 0.9em;
    }

    .logo-design {
        height: 36px;
        width: 36px;
    }

    .logo-badge {
        width: 36px !important;
        height: 36px !important;
    }

    .logo-currency {
        font-size: 1.2em !important;
    }

    .logo-tag {
        font-size: 1em !important;
    }

    .mobile-menu-toggle {
        padding: 0.3rem;
        width: 40px;
        height: 40px;
    }

    .mobile-menu-toggle span {
        width: 20px;
        height: 2px;
    }

    .nav-menu {
        width: 260px;
        max-width: 80vw;
    }

    /* Smaller carousel cards for small screens */
    .date-group-products .card {
        flex: 0 0 260px;
        min-width: 260px;
        max-width: 260px;
    }

    .page-header h2 {
        font-size: 1.5em;
    }

    .page-header p {
        font-size: 0.9em;
    }

    .category-btn {
        padding: 0.5rem 0.875rem;
        font-size: 0.8em;
    }

    .card-title {
        font-size: 1em;
    }

    .price {
        font-size: 1.4em;
    }

    .btn {
        padding: 0.65rem 1rem;
        font-size: 0.9em;
    }

    .modal-content {
        padding: 1rem;
        border-radius: 20px;
    }

    .promo-title {
        font-size: 1.2em;
    }

    .camera-controls .btn {
        font-size: 0.9em;
        padding: 0.65rem 1rem;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .date-group-products {
        grid-template-columns: repeat(3, 1fr);
        gap: 1.5rem;
    }
    
    .date-group-promotions {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
}

/* ===================================
   Utility Classes
   =================================== */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

/* ===================================
   Touch-Friendly Enhancements
   =================================== */
@media (hover: none) and (pointer: coarse) {
    /* Touch device optimizations */
    .btn,
    .category-btn,
    .nav-link {
        min-height: 44px;
        min-width: 44px;
    }

    .btn-icon {
        min-height: 36px;
        min-width: 36px;
    }

    .card {
        cursor: pointer;
        -webkit-tap-highlight-color: transparent;
    }

    .card:active {
        transform: scale(0.98);
    }

    input,
    textarea,
    select {
        font-size: 16px !important; /* Prevent zoom on iOS */
    }
}

/* ===================================
   Camera Upload Styles
   =================================== */
.upload-method-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.upload-method-buttons .btn {
    flex: 1;
    justify-content: center;
}

.camera-preview {
    position: relative;
    width: 100%;
    max-width: 640px;
    margin: 0 auto 1.5rem;
    background: var(--clay-bg-secondary);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--clay-shadow-pressed);
    cursor: pointer;
    transition: transform 0.2s ease;
}

.camera-preview:hover {
    transform: scale(1.02);
}

.camera-preview:active {
    transform: scale(0.98);
}

/* 拍照提示 */
.tap-to-capture-hint {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    font-size: 1em;
    font-weight: 600;
    pointer-events: none;
    animation: hintPulse 2s ease-in-out infinite;
    backdrop-filter: blur(10px);
}

@keyframes hintPulse {
    0%, 100% {
        opacity: 0.8;
        transform: translateX(-50%) scale(1);
    }
    50% {
        opacity: 1;
        transform: translateX(-50%) scale(1.05);
    }
}

/* 拍照後隱藏提示 */
.camera-preview.photo-taken .tap-to-capture-hint {
    display: none;
}

#camera-video,
.photo-preview {
    width: 100%;
    display: block;
    border-radius: 20px;
}

#camera-video {
    /* 默認不翻轉（後置鏡頭） */
}

/* 前置鏡頭時翻轉畫面（鏡像效果） */
#camera-video.front-camera {
    transform: scaleX(-1);
}

.photo-preview img {
    width: 100%;
    display: block;
    border-radius: 20px;
}

.camera-controls {
    display: flex;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.camera-controls .btn {
    min-width: 120px;
}

#capture-btn {
    min-width: 150px;
    font-size: 1.2em;
}

/* 相機模態框特殊樣式 */
#camera-modal .modal-content {
    max-width: 800px;
}

/* 移動端相機優化 */
@media (max-width: 768px) {
    .upload-method-buttons {
        flex-direction: column;
    }
    
    .camera-preview {
        max-width: 100%;
    }
    
    .camera-controls {
        flex-direction: column;
        width: 100%;
    }
    
    .camera-controls .btn {
        width: 100%;
        min-width: auto;
    }
    
    #camera-modal .modal-content {
        width: 100%;
        height: 100vh;
        max-height: 100vh;
        border-radius: 0;
        padding: 1rem;
    }
}

.file-hint {
    font-size: 0.875em;
    color: var(--clay-text-light);
    margin-top: 0.5rem;
    line-height: 1.6;
}

/* ===================================
   Comment System Styles
   =================================== */
.comment-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--clay-bg-secondary);
}

.comment-header-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 1.1em;
    font-weight: 700;
    color: var(--clay-text);
}

.comment-count {
    background: linear-gradient(145deg, var(--clay-accent), var(--clay-accent-dark));
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.875em;
}

/* 留言輸入區 */
.comment-input-area {
    margin-bottom: 1.5rem;
}

.comment-input-wrapper {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
}

.comment-input {
    flex: 1;
    padding: 0.75rem 1rem;
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border: none;
    border-radius: 20px;
    color: var(--clay-text);
    font-size: 0.875em;
    box-shadow: var(--clay-shadow-pressed);
    resize: vertical;
    min-height: 60px;
    font-family: inherit;
}

.comment-input:focus {
    outline: none;
    box-shadow: inset 8px 8px 16px rgba(0,0,0,0.12), inset -8px -8px 16px rgba(255,255,255,0.8);
}

.comment-submit-btn {
    padding: 0.75rem 1.5rem;
    white-space: nowrap;
}

/* 留言列表 */
.comments-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.no-comments {
    text-align: center;
    padding: 2rem;
    color: var(--clay-text-light);
    font-style: italic;
}

/* 留言項目 */
.comment-item {
    padding: 1rem;
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border-radius: 20px;
    box-shadow: var(--clay-shadow-button);
}

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.comment-user {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.user-avatar {
    font-size: 1.5em;
}

.user-name {
    font-weight: 700;
    color: var(--clay-text);
}

.comment-time,
.reply-time {
    font-size: 0.75em;
    color: var(--clay-text-light);
}

.comment-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-icon {
    background: none;
    border: none;
    padding: 0.25rem 0.5rem;
    cursor: pointer;
    font-size: 0.875em;
    color: var(--clay-text-light);
    border-radius: 10px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.btn-icon:hover {
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    color: var(--clay-text);
    box-shadow: var(--clay-shadow-button);
}

.like-btn:hover {
    color: #ef4444;
}

.reply-btn:hover {
    color: #3b82f6;
}

.delete-btn:hover {
    color: #ef4444;
}

.like-count {
    font-weight: 600;
}

.comment-content {
    color: var(--clay-text);
    line-height: 1.6;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* 回覆表單 */
.reply-form {
    margin-top: 0.75rem;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 15px;
}

.reply-input {
    width: 100%;
    padding: 0.5rem 0.75rem;
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border: none;
    border-radius: 15px;
    color: var(--clay-text);
    font-size: 0.875em;
    box-shadow: var(--clay-shadow-pressed);
    margin-bottom: 0.5rem;
}

.reply-input:focus {
    outline: none;
    box-shadow: inset 6px 6px 12px rgba(0,0,0,0.12), inset -6px -6px 12px rgba(255,255,255,0.8);
}

.reply-form-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
}

/* 回覆列表 */
.replies {
    margin-top: 0.75rem;
    padding-left: 2rem;
    border-left: 3px solid var(--clay-accent);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.reply-item {
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 15px;
}

.reply-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.reply-header .user-avatar {
    font-size: 1.2em;
}

.reply-header .user-name {
    font-size: 0.875em;
}

.reply-content {
    color: var(--clay-text);
    font-size: 0.875em;
    line-height: 1.5;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* 響應式設計 */
@media (max-width: 768px) {
    .comment-input-wrapper {
        flex-direction: column;
    }
    
    .comment-submit-btn {
        width: 100%;
    }
    
    .comment-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .comment-actions {
        width: 100%;
        justify-content: flex-start;
    }
    
    .replies {
        padding-left: 1rem;
    }
}

/* ===================================
   Enhanced Retailer Selection Buttons
   =================================== */
.retailer-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.75rem;
    margin: 1rem 0;
}

.retailer-btn {
    position: relative;
    padding: 1rem 1.25rem;
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border: 3px solid transparent;
    border-radius: 20px;
    color: var(--clay-text);
    font-weight: 700;
    font-size: 1em;
    cursor: pointer;
    box-shadow: var(--clay-shadow-button);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: center;
    overflow: hidden;
}

.retailer-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(212,165,116,0.1), rgba(200,152,96,0.1));
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: 17px;
}

.retailer-btn:hover::before {
    opacity: 1;
}

.retailer-btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--clay-shadow-hover);
    border-color: var(--clay-accent);
}

.retailer-btn.active {
    background: linear-gradient(145deg, var(--clay-accent), var(--clay-accent-dark));
    color: var(--clay-white);
    border-color: var(--clay-accent-dark);
    box-shadow: 0 8px 20px rgba(212,165,116,0.4), 
                inset 0 2px 4px rgba(255,255,255,0.3),
                inset 0 -2px 4px rgba(0,0,0,0.2);
    transform: translateY(-2px);
}

.retailer-btn.active::after {
    content: '✓';
    position: absolute;
    top: 5px;
    right: 8px;
    font-size: 0.875em;
    font-weight: 900;
    color: var(--clay-white);
    background: rgba(255,255,255,0.2);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: checkmark 0.3s ease-out;
}

@keyframes checkmark {
    0% {
        transform: scale(0) rotate(-45deg);
        opacity: 0;
    }
    50% {
        transform: scale(1.2) rotate(0deg);
    }
    100% {
        transform: scale(1) rotate(0deg);
        opacity: 1;
    }
}

.retailer-btn:active {
    transform: translateY(0) scale(0.98);
    box-shadow: var(--clay-shadow-pressed);
}

/* Retailer buttons - clean design without icons */

/* ===================================
   Enhanced Upload Form Styles
   =================================== */
.upload-form {
    padding: 0.5rem 0;
}

.upload-form h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--clay-text);
    font-size: 1.8em;
    font-weight: 800;
    text-shadow: 2px 2px 4px rgba(255,255,255,0.5);
}

.form-group {
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.4s ease-out;
}

.form-label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 700;
    color: var(--clay-text);
    font-size: 1.05em;
}

.required {
    color: #ef4444;
    font-weight: 900;
}

.form-control {
    width: 100%;
    padding: 1rem 1.5rem;
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border: 2px solid transparent;
    border-radius: 20px;
    color: var(--clay-text);
    font-size: 1em;
    box-shadow: var(--clay-shadow-pressed);
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-control:hover {
    border-color: var(--clay-accent);
}

.form-control:focus {
    outline: none;
    border-color: var(--clay-accent);
    box-shadow: inset 8px 8px 16px rgba(0,0,0,0.12), 
                inset -8px -8px 16px rgba(255,255,255,0.8),
                0 0 0 3px rgba(212,165,116,0.2);
}

.form-control.error {
    border-color: #ef4444;
    box-shadow: inset 8px 8px 16px rgba(239,68,68,0.1), 
                inset -8px -8px 16px rgba(255,255,255,0.8),
                0 0 0 3px rgba(239,68,68,0.1);
}

.error-message {
    display: none;
    margin-top: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: linear-gradient(145deg, #fee2e2, #fecaca);
    color: #991b1b;
    font-size: 0.875em;
    font-weight: 600;
    border-radius: 12px;
    border-left: 4px solid #ef4444;
    animation: shake 0.3s ease-in-out;
}

/* Photo Upload Section */
.photo-upload-section {
    margin-top: 0.5rem;
}

.upload-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.btn-camera,
.btn-file {
    flex: 1;
    padding: 1rem;
    background: linear-gradient(145deg, var(--clay-accent), var(--clay-accent-dark));
    color: white;
    border: none;
    border-radius: 15px;
    font-size: 1em;
    font-weight: 700;
    cursor: pointer;
    box-shadow: var(--clay-shadow-button);
    transition: all 0.3s ease;
}

.btn-camera:hover,
.btn-file:hover {
    transform: translateY(-2px);
    box-shadow: var(--clay-shadow-hover);
}

.btn-camera:active,
.btn-file:active {
    transform: translateY(0);
    box-shadow: var(--clay-shadow-pressed);
}

/* Multi-photo preview grid */
.photos-preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.photo-preview-item {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--clay-shadow-raised);
    aspect-ratio: 1;
}

.photo-preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.btn-remove-photo-item {
    position: absolute;
    top: 5px;
    right: 5px;
    width: 30px;
    height: 30px;
    background: rgba(239, 68, 68, 0.9);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.1em;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 6px rgba(0,0,0,0.3);
    transition: all 0.3s ease;
}

.btn-remove-photo-item:hover {
    background: rgba(220, 38, 38, 1);
    transform: scale(1.1);
}

/* Card image gallery */
.card-image-gallery {
    position: relative;
}

.card-image-gallery .main-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.image-count {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.85em;
    font-weight: 700;
}

.photo-preview-container {
    position: relative;
    margin-top: 1rem;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--clay-shadow-raised);
}

.photo-preview-container img {
    width: 100%;
    height: auto;
    max-height: 300px;
    object-fit: contain;
    display: block;
    background: var(--clay-white);
}

.btn-remove-photo {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 35px;
    height: 35px;
    background: rgba(239, 68, 68, 0.9);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2em;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
    transition: all 0.3s ease;
}

.btn-remove-photo:hover {
    background: rgba(220, 38, 38, 1);
    transform: scale(1.1);
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* ===================================
   Enhanced Upload Method Buttons
   =================================== */
.upload-method-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.upload-method-buttons .btn {
    padding: 1.25rem 1.5rem;
    font-size: 1.05em;
    font-weight: 700;
    border: 3px solid transparent;
    position: relative;
    overflow: hidden;
}

.upload-method-buttons .btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.upload-method-buttons .btn:hover::before {
    width: 300px;
    height: 300px;
}

.upload-method-buttons .btn:hover {
    border-color: var(--clay-accent);
    transform: translateY(-4px);
}

.btn-outline {
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    color: var(--clay-text);
    border: 3px dashed var(--clay-accent);
}

.btn-outline:hover {
    background: linear-gradient(145deg, var(--clay-accent), var(--clay-accent-dark));
    color: var(--clay-white);
    border-style: solid;
}

/* ===================================
   Image Preview Enhancement
   =================================== */
.image-preview {
    margin: 1.5rem 0;
    padding: 1rem;
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border-radius: 20px;
    box-shadow: var(--clay-shadow-pressed);
    text-align: center;
    animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.image-preview img {
    max-width: 100%;
    max-height: 300px;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    object-fit: contain;
}

/* ===================================
   Form Actions Enhancement
   =================================== */
.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--clay-bg-secondary);
}

.form-actions .btn {
    flex: 1;
    padding: 1rem 2rem;
    font-size: 1.1em;
    font-weight: 700;
    position: relative;
    overflow: hidden;
}

.form-actions .btn-primary {
    background: linear-gradient(145deg, var(--clay-accent), var(--clay-accent-dark));
    box-shadow: 0 8px 20px rgba(212,165,116,0.4),
                inset 0 2px 4px rgba(255,255,255,0.3);
}

.form-actions .btn-primary:hover {
    box-shadow: 0 12px 28px rgba(212,165,116,0.5),
                inset 0 2px 4px rgba(255,255,255,0.4);
    transform: translateY(-4px);
}

.form-actions .btn-secondary {
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    color: var(--clay-text);
}

.form-actions .btn-secondary:hover {
    background: linear-gradient(145deg, #e5e7eb, #d1d5db);
}

.btn-loading {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-loading::after {
    content: '';
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ===================================
   File Upload Enhancement
   =================================== */
.file-upload-wrapper {
    position: relative;
}

.file-input {
    position: absolute;
    width: 0.1px;
    height: 0.1px;
    opacity: 0;
    overflow: hidden;
    z-index: -1;
}

.file-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1.25rem 1.5rem;
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border: 3px dashed var(--clay-accent);
    border-radius: 20px;
    color: var(--clay-text);
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--clay-shadow-button);
}

.file-label:hover {
    background: linear-gradient(145deg, var(--clay-accent), var(--clay-accent-dark));
    color: var(--clay-white);
    border-style: solid;
    transform: translateY(-3px);
    box-shadow: var(--clay-shadow-hover);
}

.file-icon {
    font-size: 1.5em;
}

.file-text {
    font-size: 1.05em;
}

.file-info {
    margin-top: 0.75rem;
    padding: 0.75rem 1rem;
    background: linear-gradient(145deg, #d1fae5, #a7f3d0);
    color: #065f46;
    font-size: 0.875em;
    font-weight: 600;
    border-radius: 12px;
    border-left: 4px solid #10b981;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.file-hint {
    margin-top: 0.75rem;
    font-size: 0.875em;
    color: var(--clay-text-light);
    line-height: 1.6;
    text-align: center;
}

/* ===================================
   Product Item Enhancement (for Promotion Form)
   =================================== */
.products-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.product-item {
    padding: 1.5rem;
    background: linear-gradient(145deg, rgba(255,255,255,0.5), rgba(245,230,211,0.3));
    border-radius: 20px;
    border: 2px solid var(--clay-accent);
    box-shadow: var(--clay-shadow-button);
    animation: fadeInUp 0.4s ease-out;
}

.product-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--clay-bg-secondary);
}

.product-item-header h4 {
    color: var(--clay-accent);
    font-size: 1.2em;
    font-weight: 800;
    margin: 0;
}

.btn-remove {
    width: 32px;
    height: 32px;
    padding: 0;
    background: linear-gradient(145deg, #fee2e2, #fecaca);
    color: #991b1b;
    border: none;
    border-radius: 50%;
    font-size: 1.2em;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 4px 4px 8px rgba(0,0,0,0.1), -4px -4px 8px rgba(255,255,255,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-remove:hover {
    background: linear-gradient(145deg, #ef4444, #dc2626);
    color: white;
    transform: rotate(90deg) scale(1.1);
    box-shadow: 0 4px 12px rgba(239,68,68,0.4);
}

.product-item-fields {
    display: grid;
    gap: 1rem;
}

/* ===================================
   Responsive Enhancements for Forms
   =================================== */
@media (max-width: 768px) {
    .retailer-buttons {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
        justify-content: flex-start;
    }

    .retailer-btn {
        padding: 0.75rem 1rem;
        font-size: 0.9em;
        flex: 0 0 auto;
        min-width: auto;
        width: auto;
    }

    .retailer-btn[data-retailer]::before {
        font-size: 1em;
        top: 6px;
        left: 8px;
    }

    .upload-method-buttons {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .form-actions {
        flex-direction: column-reverse;
    }

    .form-actions .btn {
        width: 100%;
    }

    .product-item {
        padding: 1rem;
    }

    .upload-form h2 {
        font-size: 1.5em;
    }
}

@media (max-width: 480px) {
    .retailer-buttons {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .retailer-btn {
        padding: 0.75rem 1rem;
        font-size: 0.9em;
        flex: 0 0 auto;
        width: auto;
    }
}

/* ===================================
   Loading State Enhancement
   =================================== */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn:disabled:hover {
    transform: none !important;
    box-shadow: var(--clay-shadow-button) !important;
}

/* ===================================
   Accessibility Enhancements
   =================================== */
.retailer-btn:focus,
.btn:focus,
.form-control:focus {
    outline: 3px solid var(--clay-accent);
    outline-offset: 2px;
}

.retailer-btn:focus:not(:focus-visible),
.btn:focus:not(:focus-visible),
.form-control:focus:not(:focus-visible) {
    outline: none;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .retailer-btn,
    .btn,
    .form-control {
        border-width: 3px;
    }

    .retailer-btn.active {
        border-width: 4px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .retailer-btn,
    .btn,
    .form-control,
    .card,
    .image-preview,
    .product-item {
        animation: none;
        transition: none;
    }

    .retailer-btn:hover,
    .btn:hover {
        transform: none;
    }
}

/* ===================================
   Product Autocomplete Styles
   =================================== */
.autocomplete-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-top: 0.5rem;
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border-radius: 20px;
    box-shadow: var(--clay-shadow-raised);
    max-height: 300px;
    overflow-y: auto;
    z-index: 1000;
    animation: slideDown 0.3s ease-out;
}

.autocomplete-item {
    padding: 1rem 1.25rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.autocomplete-item:last-child {
    border-bottom: none;
}

.autocomplete-item:hover,
.autocomplete-item.active {
    background: linear-gradient(145deg, var(--clay-accent), var(--clay-accent-dark));
    color: var(--clay-white);
}

.autocomplete-item:hover .autocomplete-item-meta,
.autocomplete-item.active .autocomplete-item-meta {
    color: rgba(255,255,255,0.9);
}

.autocomplete-item-name {
    font-weight: 700;
    font-size: 1em;
    margin-bottom: 0.25rem;
    color: var(--clay-text);
}

.autocomplete-item:hover .autocomplete-item-name,
.autocomplete-item.active .autocomplete-item-name {
    color: var(--clay-white);
}

.autocomplete-item-name strong {
    color: var(--clay-accent);
    background: rgba(212,165,116,0.2);
    padding: 0 0.25rem;
    border-radius: 4px;
}

.autocomplete-item:hover .autocomplete-item-name strong,
.autocomplete-item.active .autocomplete-item-name strong {
    color: var(--clay-white);
    background: rgba(255,255,255,0.3);
}

.autocomplete-item-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875em;
    color: var(--clay-text-light);
    gap: 0.5rem;
}

.autocomplete-category {
    padding: 0.25rem 0.75rem;
    background: linear-gradient(145deg, rgba(212,165,116,0.2), rgba(200,152,96,0.2));
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.85em;
}

.autocomplete-item:hover .autocomplete-category,
.autocomplete-item.active .autocomplete-category {
    background: rgba(255,255,255,0.2);
    color: var(--clay-white);
}

.autocomplete-retailers {
    font-size: 0.85em;
    opacity: 0.8;
}

.autocomplete-source {
    font-size: 0.85em;
    padding: 0.2rem 0.5rem;
    background: rgba(255,255,255,0.3);
    border-radius: 8px;
    margin-left: auto;
}

.autocomplete-item:hover .autocomplete-source,
.autocomplete-item.active .autocomplete-source {
    background: rgba(255,255,255,0.2);
}

/* Scrollbar styling for autocomplete */
.autocomplete-dropdown::-webkit-scrollbar {
    width: 8px;
}

.autocomplete-dropdown::-webkit-scrollbar-track {
    background: rgba(0,0,0,0.05);
    border-radius: 10px;
}

.autocomplete-dropdown::-webkit-scrollbar-thumb {
    background: var(--clay-accent);
    border-radius: 10px;
}

.autocomplete-dropdown::-webkit-scrollbar-thumb:hover {
    background: var(--clay-accent-dark);
}

/* Loading state for autocomplete */
.autocomplete-loading {
    padding: 1rem;
    text-align: center;
    color: var(--clay-text-light);
    font-size: 0.875em;
}

.autocomplete-loading::after {
    content: '';
    display: inline-block;
    width: 16px;
    height: 16px;
    margin-left: 0.5rem;
    border: 2px solid var(--clay-accent);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* No results state */
.autocomplete-no-results {
    padding: 1.5rem;
    text-align: center;
    color: var(--clay-text-light);
    font-size: 0.875em;
}

/* Mobile responsive */
@media (max-width: 768px) {
    .autocomplete-dropdown {
        max-height: 250px;
        border-radius: 15px;
    }

    .autocomplete-item {
        padding: 0.875rem 1rem;
    }

    .autocomplete-item-name {
        font-size: 0.95em;
    }

    .autocomplete-item-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }
}

/* API 數據來源標記 */
.autocomplete-source {
    margin-left: auto;
    font-size: 0.9rem;
    opacity: 0.6;
    cursor: help;
    transition: opacity 0.2s ease;
}

.autocomplete-item:hover .autocomplete-source {
    opacity: 1;
}

.autocomplete-item-meta {
    flex-wrap: wrap;
}

/* ============================================
   Donation Tag (Small & Subtle)
   ============================================ */

.footer-logo-wrapper {
    display: flex;
    align-items: center;
    gap: 1rem;
    justify-content: center;
}

.donation-tag {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 20px;
    font-size: 1em;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    letter-spacing: 0.5px;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    text-align: center;
    line-height: 1.2;
}

.donation-line1 {
    font-size: 0.85em;
    font-weight: 600;
    opacity: 0.9;
}

.donation-line2 {
    font-size: 1em;
    font-weight: 800;
}

.donation-tag:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Donation Modal */
.donation-modal-content {
    text-align: center;
}

.donation-modal-content h2 {
    font-size: 2em;
    margin-bottom: 1rem;
    color: var(--clay-text);
}

.payment-selection {
    padding: 1rem 0;
}

.donation-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin: 2rem 0;
}

.donation-option {
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border: 3px solid transparent;
    border-radius: 20px;
    padding: 1.5rem 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--clay-shadow-button);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.donation-option:hover {
    border-color: var(--clay-accent);
    transform: translateY(-5px);
    box-shadow: var(--clay-shadow-hover);
}

.donation-option.selected {
    border-color: var(--clay-accent);
    background: linear-gradient(145deg, var(--clay-accent), var(--clay-accent-dark));
}

.donation-option.selected .amount,
.donation-option.selected .label {
    color: white;
}

.donation-option .amount {
    font-size: 2em;
    font-weight: 800;
    color: var(--clay-accent);
}

.donation-option .label {
    font-size: 0.9em;
    color: var(--clay-text-light);
}

.payment-methods {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 2rem 0;
}

.payment-methods h3 {
    font-size: 1.2em;
    margin-bottom: 1rem;
    color: var(--clay-text);
    text-align: center;
}

.payment-btn-large {
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border: 3px solid transparent;
    border-radius: 20px;
    padding: 1.5rem 2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--clay-shadow-button);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    font-size: 1.2em;
    font-weight: 700;
    color: var(--clay-text);
}

.payment-btn-large:hover {
    border-color: var(--clay-accent);
    transform: translateY(-5px);
    box-shadow: var(--clay-shadow-hover);
}

.payment-icon {
    font-size: 2em;
}

.payment-name {
    font-size: 1em;
}

/* QR Code Display */
.qr-code-display {
    padding: 1rem 0;
}

.back-btn {
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border: none;
    border-radius: 15px;
    padding: 0.75rem 1.5rem;
    font-size: 1em;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--clay-shadow-button);
    color: var(--clay-text);
    margin-bottom: 1.5rem;
}

.back-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--clay-shadow-hover);
}

#qr-title {
    font-size: 1.8em;
    margin-bottom: 0.5rem;
    color: var(--clay-text);
}

#qr-instruction {
    color: var(--clay-text-light);
    margin-bottom: 2rem;
}

.qr-code-container {
    display: flex;
    justify-content: center;
    margin: 2rem 0;
}

.qr-placeholder {
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--clay-shadow-raised);
}

.qr-box {
    width: 200px;
    height: 200px;
    background: white;
    border: 3px solid var(--clay-text);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.qr-pattern {
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(90deg, var(--clay-text) 2px, transparent 2px),
        linear-gradient(var(--clay-text) 2px, transparent 2px);
    background-size: 20px 20px;
    opacity: 0.3;
}

.donation-amount-display {
    background: linear-gradient(145deg, var(--clay-accent), var(--clay-accent-dark));
    color: white;
    padding: 1rem 2rem;
    border-radius: 20px;
    display: inline-block;
    margin: 1.5rem 0;
    box-shadow: var(--clay-shadow-button);
}

.amount-label {
    font-size: 1em;
    margin-right: 0.5rem;
}

.amount-value {
    font-size: 1.5em;
    font-weight: 800;
}

.qr-note {
    color: var(--clay-text-light);
    font-size: 0.9em;
    font-style: italic;
    margin-top: 1rem;
}

.payment-link-container {
    margin: 1.5rem 0;
    text-align: center;
}

.payment-link-btn {
    display: inline-block;
    padding: 1rem 2rem;
    background: linear-gradient(145deg, var(--clay-success), var(--clay-success-dark));
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 700;
    font-size: 1.1em;
    box-shadow: var(--clay-shadow-button);
    transition: all 0.3s ease;
}

.payment-link-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--clay-shadow-hover);
}

.payment-link-btn:active {
    transform: translateY(0);
    box-shadow: var(--clay-shadow-pressed);
}

.donation-note {
    margin-top: 2rem;
    font-size: 0.9em;
    color: var(--clay-text-light);
    font-style: italic;
}

/* ============================================
   Suggestion Area
   ============================================ */

.suggestion-area {
    background: linear-gradient(145deg, var(--clay-surface), var(--clay-bg-secondary));
    border-radius: 30px;
    padding: 2rem;
    margin-bottom: 3rem;
    box-shadow: var(--clay-shadow-raised);
    text-align: center;
}

.suggestion-area h3 {
    font-size: 1.5em;
    font-weight: 800;
    color: var(--clay-text);
    margin-bottom: 0.5rem;
}

.suggestion-area > p {
    color: var(--clay-text-light);
    margin-bottom: 1.5rem;
}

.suggestion-form {
    max-width: 600px;
    margin: 0 auto;
}

.suggestion-form textarea {
    width: 100%;
    padding: 1rem 1.5rem;
    background: linear-gradient(145deg, var(--clay-bg-primary), var(--clay-bg-secondary));
    border: none;
    border-radius: 20px;
    color: var(--clay-text);
    font-size: 1em;
    font-family: inherit;
    resize: vertical;
    box-shadow: var(--clay-shadow-pressed);
    transition: all 0.3s ease;
    margin-bottom: 1rem;
}

.suggestion-form textarea:focus {
    outline: none;
    box-shadow: inset 10px 10px 20px rgba(0,0,0,0.15), inset -10px -10px 20px rgba(255,255,255,0.8);
}

.suggestion-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.char-count {
    font-size: 0.875em;
    color: var(--clay-text-light);
}

/* ============================================
   Footer Styles
   ============================================ */

.footer {
    background: linear-gradient(145deg, var(--clay-accent), var(--clay-accent-dark));
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 0;
}

.footer-logo-design {
    margin-bottom: 1rem;
    width: fit-content;
    height: 60px;
    padding: 0.75rem 1.5rem;
}

.footer-logo-design:hover {
    transform: scale(1.05);
}

.footer-content {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 2rem;
}

.footer-center {
    text-align: center;
    max-width: 600px;
}

.footer-section h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: white;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.footer-section p {
    line-height: 1.6;
    opacity: 0.9;
    margin-bottom: 1rem;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 0.5rem;
    opacity: 0.9;
    transition: opacity 0.3s ease;
}

.footer-links li:hover {
    opacity: 1;
}

.footer-links a {
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

.footer-links a:hover {
    transform: translateX(5px);
    text-decoration: underline;
}

.footer-social {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    justify-content: center;
}

.footer-social a {
    font-size: 1.5rem;
    text-decoration: none;
    transition: transform 0.3s ease;
    display: inline-block;
}

.footer-social a:hover {
    transform: scale(1.2) rotate(5deg);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.2);
    padding-top: 1.5rem;
    text-align: center;
}

.footer-bottom p {
    margin: 0.5rem 0;
    opacity: 0.8;
    font-size: 0.9rem;
}

.footer-tech {
    font-size: 0.85rem !important;
    opacity: 0.7 !important;
}

.footer-tech a {
    color: white;
    text-decoration: underline;
    transition: opacity 0.3s ease;
}

.footer-tech a:hover {
    opacity: 1;
}

/* Responsive Footer */
@media (max-width: 768px) {
    /* Donation Tag Mobile */
    .footer-logo-wrapper {
        flex-direction: column;
        gap: 0.75rem;
    }

    .donation-tag {
        font-size: 0.9em;
        padding: 0.6rem 1.25rem;
    }

    .donation-line1 {
        font-size: 0.8em;
    }

    .donation-line2 {
        font-size: 0.95em;
    }

    /* Donation Modal Mobile */
    .donation-options {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .donation-option {
        padding: 1.25rem 1rem;
    }

    .payment-btn-large {
        padding: 1.25rem 1.5rem;
        font-size: 1.1em;
    }

    .payment-icon {
        font-size: 1.8em;
    }

    .qr-box {
        width: 180px;
        height: 180px;
    }

    .qr-placeholder {
        padding: 1.5rem;
    }

    .donation-amount-display {
        padding: 0.875rem 1.5rem;
    }

    .amount-value {
        font-size: 1.3em;
    }

    /* Suggestion Area Mobile */
    .suggestion-area {
        padding: 1.5rem 1rem;
        margin-bottom: 2rem;
        border-radius: 20px;
    }

    .suggestion-area h3 {
        font-size: 1.3em;
    }

    .suggestion-area > p {
        font-size: 0.9em;
    }

    .suggestion-form textarea {
        padding: 0.875rem 1.25rem;
        font-size: 0.95em;
    }

    .suggestion-actions {
        flex-direction: column;
        gap: 0.75rem;
        align-items: stretch;
    }

    .char-count {
        text-align: center;
    }

    /* Footer Mobile */
    .footer {
        padding: 2rem 0 1rem;
        margin-top: 0;
    }

    .footer-logo-design {
        height: 50px;
        width: 50px;
        margin: 0 auto 1rem;
        display: flex;
        padding: 0;
    }

    .footer-logo-design .logo-badge {
        width: 50px !important;
        height: 50px !important;
    }

    .footer-logo-design .logo-currency {
        font-size: 1.8em !important;
    }

    .footer-logo-design .logo-tag {
        font-size: 1.3em !important;
    }

    .footer-content {
        flex-direction: column;
    }

    .footer-center {
        max-width: 100%;
    }

    .footer-section {
        text-align: center;
    }

    .footer-social {
        justify-content: center;
    }

    .footer-links {
        text-align: center;
    }
}

/* Dark mode support (optional) */
@media (prefers-color-scheme: dark) {
    .footer {
        background: linear-gradient(145deg, var(--clay-accent-dark), #b8844c);
    }
}


/* ===================================
   Share Buttons
   =================================== */
.share-buttons {
    display: flex;
    gap: 0.75rem;
    margin: 1.5rem 0;
    flex-wrap: wrap;
}

.btn-share {
    flex: 1;
    min-width: 140px;
    padding: 0.875rem 1.25rem;
    background: linear-gradient(145deg, var(--clay-success), var(--clay-success-dark));
    color: var(--clay-white);
    border: none;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.95em;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: var(--clay-shadow-button);
    transition: all 0.3s ease;
}

.btn-share:hover {
    transform: translateY(-3px);
    box-shadow: var(--clay-shadow-hover);
}

.btn-share:active {
    transform: translateY(0);
    box-shadow: var(--clay-shadow-pressed);
}

.btn-share:nth-child(2) {
    background: linear-gradient(145deg, var(--clay-accent), var(--clay-accent-dark));
}

.share-icon {
    font-size: 1.2em;
}

@media (max-width: 768px) {
    .share-buttons {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .btn-share {
        width: 100%;
        min-width: auto;
    }
}