/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #2D5016;
    --primary-light: #4A7C23;
    --primary-dark: #1A3009;
    --accent: #D4A574;
    --accent-light: #E8C9A8;
    --bg: #F9F7F4;
    --bg-card: #FFFFFF;
    --text: #333333;
    --text-light: #666666;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
    --radius: 16px;
    --radius-sm: 12px;
}

body {
    font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
}

.app {
    max-width: 480px;
    margin: 0 auto;
    min-height: 100vh;
    background: var(--bg);
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 32px 24px;
    text-align: center;
}

.logo {
    margin-bottom: 16px;
}

.logo-text {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 4px;
    display: block;
}

.logo-subtext {
    font-size: 14px;
    font-weight: 300;
    letter-spacing: 2px;
    opacity: 0.9;
}

.title {
    font-size: 20px;
    font-weight: 400;
    margin-top: 8px;
    opacity: 0.95;
}

/* Size Selector */
.size-selector {
    padding: 24px;
}

.size-selector h2 {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-light);
    margin-bottom: 16px;
    text-align: center;
}

.size-buttons {
    display: flex;
    gap: 16px;
}

.size-btn {
    flex: 1;
    background: var(--bg-card);
    border: 2px solid transparent;
    border-radius: var(--radius);
    padding: 20px 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

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

.size-btn.active {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(45, 80, 22, 0.05) 0%, rgba(45, 80, 22, 0.1) 100%);
}

.size-number {
    display: block;
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.size-label {
    font-size: 14px;
    color: var(--text-light);
}

/* Product Section */
.product-section {
    padding: 0 24px 24px;
}

.product-section h2 {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-light);
    margin-bottom: 16px;
    text-align: center;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.product-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
    border: 2px solid transparent;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent);
}

.product-card:active {
    transform: translateY(-2px);
}

.product-icon {
    font-size: 48px;
    margin-bottom: 12px;
    display: block;
}

.product-name {
    font-size: 16px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 4px;
}

.product-desc {
    font-size: 12px;
    color: var(--text-light);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius);
    width: 100%;
    max-width: 400px;
    max-height: 85vh;
    overflow-y: auto;
    position: relative;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    border: none;
    background: var(--bg);
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.modal-close:hover {
    background: var(--primary);
    color: white;
}

.modal-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 32px 24px;
    text-align: center;
}

.tea-icon {
    font-size: 56px;
    margin-bottom: 12px;
}

.modal-header h2 {
    font-size: 24px;
    font-weight: 500;
    margin-bottom: 4px;
}

.modal-subtitle {
    font-size: 14px;
    opacity: 0.9;
}

/* Brewing Steps */
.brewing-steps {
    padding: 24px;
}

.step {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.step:last-child {
    margin-bottom: 0;
}

.step-number {
    width: 36px;
    height: 36px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-title {
    font-weight: 500;
    margin-bottom: 4px;
    color: var(--text);
}

.step-detail {
    font-size: 14px;
    color: var(--text-light);
}

.step-highlight {
    display: inline-block;
    background: var(--accent-light);
    color: var(--primary-dark);
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 500;
    font-size: 14px;
    margin-top: 8px;
}

/* Brewing Tips */
.brewing-tips {
    background: var(--bg);
    padding: 20px 24px;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.tips-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tip {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 8px;
    padding-left: 16px;
    position: relative;
}

.tip:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent);
}

.tip:last-child {
    margin-bottom: 0;
}

/* Footer */
.footer {
    text-align: center;
    padding: 24px;
    color: var(--text-light);
    font-size: 13px;
}

.footer-contact {
    margin-top: 8px;
}

.footer a {
    color: var(--primary);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 12px;
    padding: 20px 24px;
    background: var(--bg);
}

.action-btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 20px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.buy-btn {
    background: linear-gradient(135deg, #FF6B35 0%, #F7931E 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.buy-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

.line-btn {
    background: #06C755;
    color: white;
    box-shadow: 0 4px 15px rgba(6, 199, 85, 0.3);
}

.line-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(6, 199, 85, 0.4);
}

/* Timer Section */
.timer-section {
    padding: 24px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    text-align: center;
}

.timer-display {
    margin-bottom: 20px;
}

.timer-time {
    font-size: 64px;
    font-weight: 700;
    color: white;
    font-variant-numeric: tabular-nums;
    letter-spacing: 2px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.timer-time.warning {
    color: #FFD93D;
    animation: pulse 1s ease-in-out infinite;
}

.timer-time.done {
    color: #6BCB77;
    animation: celebrate 0.5s ease-in-out;
}

.timer-controls {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.timer-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    border: none;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.timer-btn .btn-icon {
    font-size: 14px;
}

.timer-start {
    background: white;
    color: var(--primary);
}

.timer-start:hover {
    background: var(--accent-light);
    transform: scale(1.05);
}

.timer-start.running {
    background: #FFD93D;
    color: #333;
}

.timer-pause {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.timer-pause:hover {
    background: rgba(255, 255, 255, 0.3);
}

.timer-reset {
    background: rgba(255, 255, 255, 0.15);
    color: white;
}

.timer-reset:hover {
    background: rgba(255, 255, 255, 0.25);
}

.timer-hint {
    margin-top: 16px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.8);
}

.hidden {
    display: none !important;
}

/* Notification Permission Banner */
.notification-banner {
    background: var(--accent-light);
    padding: 12px 24px;
    text-align: center;
    font-size: 14px;
    color: var(--primary-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.notification-banner button {
    background: var(--primary);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    font-family: inherit;
}

.notification-banner button:hover {
    background: var(--primary-dark);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes celebrate {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

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

.shake {
    animation: shake 0.5s ease-in-out;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.product-card {
    animation: fadeIn 0.4s ease forwards;
}

.product-card:nth-child(1) { animation-delay: 0.05s; }
.product-card:nth-child(2) { animation-delay: 0.1s; }
.product-card:nth-child(3) { animation-delay: 0.15s; }
.product-card:nth-child(4) { animation-delay: 0.2s; }
.product-card:nth-child(5) { animation-delay: 0.25s; }
.product-card:nth-child(6) { animation-delay: 0.3s; }

/* Responsive */
@media (max-width: 360px) {
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .size-buttons {
        flex-direction: column;
    }
}

/* Product Images */
.product-img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    border-radius: 12px;
    margin-bottom: 8px;
}

.modal-product-img {
    width: 120px;
    height: 120px;
    object-fit: contain;
    border-radius: 16px;
}