/* =============================================
   What to Eat - Warm Pastel Cute Design System
   2025-2026 Cute-alism Trend
   ============================================= */

:root {
    /* Primary Palette - Warm Coral/Peach */
    --primary: #FF8B7B;
    --primary-light: #FFB5A7;
    --primary-dark: #E07565;
    --primary-gradient: linear-gradient(135deg, #FFB5A7 0%, #FFC8A2 50%, #FFD6BA 100%);

    /* Accent Colors - Pastel Harmony */
    --accent-mint: #B8E0D2;
    --accent-lavender: #D4C1EC;
    --accent-peach: #FFDAC1;
    --accent-yellow: #FFF1C1;

    /* Background & Surface */
    --bg-main: #FFF9F5;
    --bg-warm: #FFF5EE;
    --surface: #FFFFFF;
    --surface-hover: #FFFBF8;

    /* Text Colors */
    --text-primary: #4A4458;
    --text-secondary: #7D7A8C;
    --text-muted: #A9A6B5;
    --text-on-primary: #FFFFFF;

    /* Shadows - Soft & Warm */
    --shadow-sm: 0 2px 8px rgba(74, 68, 88, 0.06);
    --shadow-md: 0 4px 20px rgba(74, 68, 88, 0.08);
    --shadow-lg: 0 8px 40px rgba(74, 68, 88, 0.12);
    --shadow-primary: 0 8px 24px rgba(255, 139, 123, 0.25);

    /* Border & Radius */
    --border-light: rgba(74, 68, 88, 0.08);
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Typography */
    --font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}


/* =====================
   Base Reset & Body
   ===================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Subtle Background Pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 20%, var(--accent-peach) 0%, transparent 25%),
        radial-gradient(circle at 80% 80%, var(--accent-mint) 0%, transparent 25%),
        radial-gradient(circle at 40% 80%, var(--accent-lavender) 0%, transparent 20%);
    opacity: 0.3;
    pointer-events: none;
    z-index: -1;
}

/* =====================
   Header
   ===================== */
header {
    height: 56px;
    padding: 0 var(--space-lg);
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--surface);
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--primary);
    letter-spacing: -0.02em;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.logo:hover {
    color: var(--primary-dark);
    transform: scale(1.02);
}

/* =====================
   Main Layout
   ===================== */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-xl) var(--space-lg);
    gap: var(--space-xl);
    max-width: 640px;
    margin: 0 auto;
    width: 100%;
}

/* =====================
   Hero Section
   ===================== */
.hero {
    text-align: center;
    animation: fadeInUp 0.6s var(--transition-slow);
}

.hero-image {
    width: 160px;
    height: auto;
    margin-bottom: var(--space-lg);
    border-radius: var(--radius-lg);
    animation: gentleFloat 4s ease-in-out infinite;
    filter: drop-shadow(0 8px 16px rgba(255, 139, 123, 0.2));
}

@keyframes gentleFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.hero h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    line-height: 1.3;
}

.hero p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 400;
}

/* =====================
   Mode Selection Hub
   ===================== */
.mode-hub {
    width: 100%;
    animation: fadeInUp 0.6s var(--transition-slow) 0.1s both;
}

.mode-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.mode-card {
    background: var(--surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--space-lg) var(--space-md);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.mode-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.mode-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.mode-card:hover::after {
    opacity: 0.03;
}

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

.mode-card > * {
    position: relative;
    z-index: 1;
}

.mode-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-sm);
    display: block;
}

.mode-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 var(--space-xs) 0;
}

.mode-desc {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin: 0 0 var(--space-sm) 0;
}

.mode-time {
    display: inline-block;
    padding: 4px 10px;
    background: var(--accent-peach);
    color: var(--primary-dark);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

/* =====================
   Mode Content Area
   ===================== */
.mode-content {
    width: 100%;
    animation: fadeIn 0.4s ease-out;
}

.mode-content.hidden {
    display: none;
}

/* Back Button */
.back-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    background: var(--surface);
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    margin-bottom: var(--space-md);
    transition: all var(--transition-base);
}

.back-button:hover {
    color: var(--primary);
    border-color: var(--primary-light);
    transform: translateX(-4px);
}

/* =====================
   Contact Section (Collapsible)
   ===================== */
.contact-section {
    width: 100%;
    animation: fadeInUp 0.6s var(--transition-slow) 0.3s both;
}

.contact-card {
    background: var(--surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.contact-card.collapsible {
    padding: 0;
}

/* Accordion Header */
.contact-header {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) var(--space-xl);
    background: transparent;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: background-color var(--transition-fast);
}

.contact-header:hover {
    background: var(--surface-hover);
}

.contact-header-content h2 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 var(--space-xs) 0;
}

.contact-header-content p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin: 0;
}

.contact-chevron {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: var(--bg-warm);
    color: var(--text-secondary);
    flex-shrink: 0;
    transition: all var(--transition-base);
}

.contact-header[aria-expanded="true"] .contact-chevron {
    transform: rotate(180deg);
    background: var(--primary-light);
    color: white;
}

/* Accordion Body */
.contact-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    padding: 0 var(--space-xl);
}

.contact-body.expanded {
    max-height: 400px;
    padding: 0 var(--space-xl) var(--space-xl) var(--space-xl);
}

/* Legacy styles for non-collapsible version */
.contact-card:not(.collapsible) {
    padding: var(--space-xl);
}

.contact-card:not(.collapsible) h2 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: var(--space-xs);
}

.contact-card:not(.collapsible) > p {
    text-align: center;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-xl);
}

/* Form Elements */
.form-group {
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    background: var(--bg-warm);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-family: inherit;
    transition: all var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--surface);
    box-shadow: 0 0 0 3px rgba(255, 139, 123, 0.15);
}

.submit-btn {
    width: 100%;
    padding: var(--space-sm) var(--space-lg);
    background: var(--primary-gradient);
    color: var(--text-on-primary);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-primary);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(255, 139, 123, 0.35);
}

.submit-btn:active {
    transform: translateY(0);
}

/* =====================
   About Section
   ===================== */
.about-section {
    width: 100%;
    animation: fadeInUp 0.6s var(--transition-slow) 0.2s both;
}

.about-card {
    background: var(--surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
}

.about-card h2 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: var(--space-md);
}

.about-intro {
    text-align: center;
    font-size: var(--font-size-lg);
    color: var(--primary);
    font-weight: 600;
    margin-bottom: var(--space-lg);
}

.about-content > p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-lg);
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--bg-warm);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.feature-item:hover {
    transform: translateX(4px);
    background: var(--accent-peach);
}

.feature-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.feature-item strong {
    display: block;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.feature-item p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin: 0;
    line-height: 1.5;
}

/* =====================
   FAQ Section
   ===================== */
.faq-section {
    width: 100%;
    animation: fadeInUp 0.6s var(--transition-slow) 0.25s both;
}

.faq-card {
    background: var(--surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
}

.faq-card h2 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: var(--space-lg);
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.faq-item {
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition-base);
}

.faq-item[open] {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-sm);
}

.faq-item summary {
    padding: var(--space-md);
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color var(--transition-fast);
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.25rem;
    color: var(--primary);
    font-weight: 400;
    transition: transform var(--transition-base);
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-item summary:hover {
    background: var(--bg-warm);
}

.faq-item > p {
    padding: 0 var(--space-md) var(--space-md) var(--space-md);
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
    animation: fadeIn 0.3s ease;
}

/* =====================
   Footer
   ===================== */
footer {
    text-align: center;
    padding: var(--space-xl) var(--space-lg);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    background: var(--surface);
    border-top: 1px solid var(--border-light);
}

.footer-content {
    max-width: 640px;
    margin: 0 auto;
}

.footer-links {
    margin-bottom: var(--space-md);
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-divider {
    margin: 0 var(--space-sm);
    color: var(--text-muted);
}

.footer-copy {
    margin: 0;
}

/* =====================
   Utility Classes
   ===================== */
.hidden {
    display: none !important;
}

/* Screen reader only - for accessibility */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Skip link for keyboard navigation */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary);
    color: white;
    padding: var(--space-sm) var(--space-md);
    z-index: 1000;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

/* =====================
   Animations
   ===================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

/* Tablet */
@media (max-width: 640px) {
    main {
        padding: var(--space-md) var(--space-sm);
        gap: var(--space-md);
    }

    .hero {
        margin-bottom: 0;
    }

    .hero-image {
        width: 100px;
        margin-bottom: var(--space-sm);
    }

    .hero h1 {
        font-size: var(--font-size-lg);
        margin-bottom: 0.25rem;
    }

    .hero p {
        font-size: var(--font-size-xs);
    }
}

/* Mobile */
@media (max-width: 480px) {
    main {
        padding: var(--space-sm);
        gap: var(--space-sm);
    }

    /* Hero - More compact */
    .hero-image {
        width: 80px;
    }

    .hero h1 {
        font-size: var(--font-size-base);
    }

    /* Mode Grid - Keep 2x2 on mobile for less scrolling */
    .mode-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }

    .mode-card {
        padding: 0.75rem 0.5rem;
    }

    .mode-icon {
        font-size: 1.5rem;
        margin-bottom: 0.25rem;
    }

    .mode-title {
        font-size: var(--font-size-sm);
        margin-bottom: 0.125rem;
    }

    .mode-desc {
        font-size: 0.625rem;
        margin-bottom: 0.375rem;
        line-height: 1.3;
    }

    .mode-time {
        padding: 2px 8px;
        font-size: 0.625rem;
    }

    /* Contact Section - Compact */
    .contact-header {
        padding: var(--space-md);
    }

    .contact-header-content h2 {
        font-size: var(--font-size-base);
    }

    .contact-header-content p {
        font-size: var(--font-size-xs);
    }

    .contact-chevron {
        width: 28px;
        height: 28px;
    }

    .contact-body.expanded {
        padding: 0 var(--space-md) var(--space-md) var(--space-md);
    }

    .form-group label {
        font-size: var(--font-size-xs);
    }

    .form-group input,
    .form-group textarea {
        padding: 0.5rem 0.75rem;
        font-size: var(--font-size-sm);
    }

    .submit-btn {
        padding: 0.625rem var(--space-md);
        font-size: var(--font-size-sm);
    }

    /* Footer */
    footer {
        padding: var(--space-md);
        font-size: var(--font-size-xs);
    }

    .footer-links a {
        font-size: var(--font-size-xs);
    }

    /* About Section - Compact */
    .about-card {
        padding: var(--space-md);
    }

    .about-card h2 {
        font-size: var(--font-size-lg);
    }

    .about-intro {
        font-size: var(--font-size-base);
        margin-bottom: var(--space-md);
    }

    .about-content > p {
        font-size: var(--font-size-sm);
        margin-bottom: var(--space-md);
    }

    .feature-item {
        padding: var(--space-sm);
        gap: var(--space-sm);
    }

    .feature-icon {
        font-size: 1.25rem;
    }

    .feature-item strong {
        font-size: var(--font-size-sm);
    }

    .feature-item p {
        font-size: var(--font-size-xs);
    }

    /* FAQ Section - Compact */
    .faq-card {
        padding: var(--space-md);
    }

    .faq-card h2 {
        font-size: var(--font-size-lg);
        margin-bottom: var(--space-md);
    }

    .faq-item summary {
        padding: var(--space-sm);
        font-size: var(--font-size-sm);
    }

    .faq-item > p {
        padding: 0 var(--space-sm) var(--space-sm) var(--space-sm);
        font-size: var(--font-size-sm);
    }
}

/* Very small screens */
@media (max-width: 360px) {
    .mode-grid {
        gap: 0.375rem;
    }

    .mode-card {
        padding: 0.5rem 0.375rem;
    }

    .mode-icon {
        font-size: 1.25rem;
    }

    .mode-title {
        font-size: var(--font-size-xs);
    }

    .mode-desc {
        display: none;
    }
}

/* =====================
   Google AdSense Containers
   ===================== */
.ad-container {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.ad-container.ad-horizontal {
    min-height: 90px;
    max-height: 250px;
    background: transparent;
    border-radius: var(--radius-md);
}

.ad-container ins.adsbygoogle {
    display: block;
    width: 100%;
    max-width: 100%;
}

/* Hide empty ad containers */
.ad-container:empty,
.ad-container ins.adsbygoogle[data-ad-status="unfilled"] {
    display: none;
}

/* Responsive ad adjustments */
@media (max-width: 640px) {
    .ad-container.ad-horizontal {
        min-height: 60px;
    }

    /* Hide first ad on tablet/mobile to keep menu visible */
    .ad-container.ad-desktop-only {
        display: none;
    }
}

@media (max-width: 480px) {
    .ad-container.ad-horizontal {
        min-height: 50px;
        margin: var(--space-xs) 0;
    }
}

/* =====================
   Component CSS Variables
   (For Web Components to inherit)
   ===================== */
:root {
    /* Shared with components */
    --card-bg: var(--surface);
    --card-border: var(--border-light);
    --card-radius: var(--radius-lg);
    --card-shadow: var(--shadow-md);
    --btn-primary-bg: var(--primary-gradient);
    --btn-primary-color: var(--text-on-primary);
    --btn-secondary-bg: var(--surface);
    --btn-secondary-color: var(--text-primary);
}