/* --- CSS Design System for META WATER Stacked Landing Page (Light Theme) --- */

:root {
    --bg-page: #eaebea;           /* Soft light gray to match image edges */
    --accent-amber: #d97706;       /* Warm amber gold for buttons and highlights */
    --accent-amber-glow: #b45309;  /* Darker amber for hover states */
    --accent-gold-bg: #fef3c7;     /* Light gold background for badges */
    
    /* Text Colors */
    --text-primary: #1f2937;       /* Dark gray for readability */
    --text-secondary: #4b5563;     /* Medium gray for descriptions */
    --text-muted: #9ca3af;         /* Light gray for placeholder/original price */
    
    /* Global border radius and fonts */
    --border-radius: 16px;
    --font-primary: 'Outfit', 'Noto Sans TC', sans-serif;
    
    --shadow-soft: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--bg-page);
    color: var(--text-primary);
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    background-color: var(--bg-page);
    display: flex;
    justify-content: center;
}

/* Centered content wrapper for both Desktop and Mobile */
.landing-container {
    width: 100%;
    max-width: 750px; /* Standard mobile-first column width matching image slices */
    background-color: #fff;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.08);
    display: flex;
    flex-direction: column;
}

/* --- Image Sections (Slice Images) --- */
.img-section {
    width: 100%;
    overflow: hidden;
}

.img-section img {
    width: 100%;
    display: block; /* Removes baseline spacing gaps between stacked images */
    height: auto;
}

/* --- Coded Pricing Section (Light Theme) --- */
.coded-plans-section {
    /* Gradient transition from Slide 7 (#D1CFC9) to Slide 9 (#F0F3EE) */
    background: linear-gradient(to bottom, #d2d0ca 0%, #eaebea 100%);
    padding: 48px 24px;
    width: 100%;
}

.plans-header {
    text-align: center;
    margin-bottom: 36px;
}

.plans-tagline {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--accent-amber);
    display: block;
    margin-bottom: 6px;
}

.plans-title {
    font-size: 1.8rem;
    font-weight: 800;
    color: #111827;
    margin-bottom: 8px;
}

.plans-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.coupon-highlight {
    background-color: var(--accent-gold-bg);
    color: var(--accent-amber);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: 'Outfit', sans-serif;
}

.plans-grid {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 40px;
}

/* Plan Cards */
.plan-card {
    background: #ffffff;
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    padding: 32px 24px;
    text-align: center;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
    cursor: pointer;
}

.plan-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.plan-card.selected {
    border-color: var(--accent-amber);
    background: #fffbeb;
}

.plan-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: #f3f4f6;
    border: 1px solid #e5e7eb;
    padding: 2px 10px;
    border-radius: 50px;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.plan-card.popular {
    border-color: rgba(217, 119, 6, 0.4);
    background: #fffdf5;
}

.plan-card.popular.selected {
    border-color: var(--accent-amber);
    background: #fffbeb;
}

.plan-card.popular::before {
    content: 'RECOMMENDED';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-amber);
    color: #ffffff;
    padding: 2px 12px;
    border-radius: 50px;
    font-size: 0.65rem;
    font-weight: 800;
    letter-spacing: 0.05em;
}

.plan-card.popular .plan-badge {
    background: var(--accent-gold-bg);
    border-color: rgba(217, 119, 6, 0.2);
    color: var(--accent-amber);
}

.plan-title {
    font-size: 1.4rem;
    font-weight: 800;
    color: #111827;
    margin-bottom: 4px;
}

.plan-qty {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.plan-pricing {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 12px;
}

.original-price {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-decoration: line-through;
    margin-bottom: 2px;
}

.current-price {
    font-size: 2rem;
    font-weight: 800;
    color: #111827;
    font-family: 'Outfit', sans-serif;
    line-height: 1;
}

.price-num {
    font-size: 2.4rem;
}

.plan-unit-cost {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.plan-features {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 24px;
    text-align: center;
    font-size: 0.9rem;
}

.plan-features li {
    color: var(--text-secondary);
}

.plan-features li strong {
    color: var(--text-primary);
}

/* Button UI */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-primary);
    font-weight: 700;
    padding: 10px 24px;
    font-size: 0.95rem;
    border-radius: 8px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--accent-amber);
    color: #ffffff;
    box-shadow: 0 2px 4px rgba(217, 119, 6, 0.2);
}

.btn-primary:hover {
    background-color: var(--accent-amber-glow);
}

.btn-secondary {
    background-color: #f3f4f6;
    color: var(--text-primary);
    border: 1px solid #d1d5db;
}

.btn-secondary:hover {
    background-color: #e5e7eb;
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 1.05rem;
}

/* Horizontal Guarantee Bar */
.guarantee-banner {
    display: flex;
    flex-direction: column;
    gap: 12px;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    padding-top: 32px;
}

.guarantee-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    background: #ffffff;
    border: 1px solid #e5e7eb;
    padding: 10px 16px;
    border-radius: 8px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
}

.guarantee-icon {
    font-size: 1.1rem;
}

/* --- Interactive Checkout Form Section --- */
.checkout-section {
    background-color: #eaebea;
    padding: 24px;
    width: 100%;
}

.checkout-card {
    background: #ffffff;
    border-radius: var(--border-radius);
    padding: 32px 24px;
    box-shadow: var(--shadow-soft);
    border: 1px solid #e5e7eb;
}

.form-title {
    font-size: 1.6rem;
    font-weight: 800;
    color: #111827;
    text-align: center;
    margin-bottom: 4px;
}

.form-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 32px;
}

#order-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 700;
    color: #374151;
}

.form-group input,
.form-group select,
.form-group textarea {
    border: 1px solid #cbd5e1;
    padding: 12px 16px;
    border-radius: 8px;
    color: #1f2937;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    outline: none;
    width: 100%;
    background-color: #f8fafc;
    transition: all 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent-amber);
    background-color: #ffffff;
    box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.1);
}

.promo-input-wrapper {
    display: flex;
    gap: 8px;
}

.promo-input-wrapper input {
    flex-grow: 1;
}

.promo-input-wrapper button {
    flex-shrink: 0;
    border-radius: 8px;
}

.promo-status {
    font-size: 0.8rem;
    font-weight: 600;
    margin-top: 2px;
}
.promo-status.success { color: #16a34a; }
.promo-status.error { color: #dc2626; }

/* Price Calculator Widget */
.price-calculator {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.calc-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.calc-row.discount-row {
    border-bottom: 1px dashed #e2e8f0;
    padding-bottom: 12px;
}

.discount-label {
    color: #16a34a;
    font-weight: 700;
}

.calc-row.total-row {
    font-size: 1.1rem;
    font-weight: 800;
    color: #111827;
    padding-top: 4px;
}

.calc-row.total-row #calc-total {
    font-size: 1.4rem;
    color: var(--accent-amber);
    font-family: 'Outfit', sans-serif;
}

.error-msg {
    font-size: 0.75rem;
    color: #dc2626;
    display: none;
    margin-top: 2px;
}

.form-group.invalid input,
.form-group.invalid select,
.form-group.invalid textarea {
    border-color: #dc2626;
    background-color: #fef2f2;
}

.form-group.invalid .error-msg {
    display: block;
}

/* --- Footer Section --- */
.footer-sec {
    background-color: #dfdfdd; /* Matches FAQ image background (#dfdfdd / #eaebea) */
    padding: 32px 24px;
    text-align: center;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.footer-sec p {
    font-size: 0.8rem;
    color: #6b7280;
    margin-bottom: 6px;
}

.footer-disclaimer {
    font-size: 0.7rem !important;
    max-width: 500px;
    margin: 8px auto 0;
    line-height: 1.4;
}

/* --- Checkout Success Modal (Light Theme) --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(17, 24, 39, 0.6);
    backdrop-filter: blur(4px);
    z-index: 2000;
    display: none; /* Changed from flex to prevent showing on initial load */
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.modal-card {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: var(--border-radius);
    padding: 36px 24px;
    max-width: 450px;
    width: 100%;
    text-align: center;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    animation: modalSlideIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.modal-title {
    font-size: 1.6rem;
    color: #111827;
    margin-bottom: 8px;
    font-weight: 800;
}

.modal-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.order-summary-box {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 16px;
    text-align: left;
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.summary-line {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.summary-line strong {
    color: #374151;
}

.price-highlight {
    color: var(--accent-amber);
    font-weight: 700;
}

@keyframes modalSlideIn {
    from { opacity: 0; transform: translateY(20px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* --- Media Queries --- */

@media (min-width: 600px) {
    .plans-grid {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .plan-card {
        flex: 1 1 200px;
        min-width: 200px;
    }
    
    .form-row {
        flex-direction: row;
    }
    
    .form-row .form-group {
        flex: 1;
    }
}