/* ==========================================================================
   Footnotes Landing Page - Mobile-First Responsive Styles
   ========================================================================== */

/* CSS Variables */
:root {
    /* Colors - Warm, literary paper palette */
    --color-primary: #8B4513;          /* Saddle brown - like aged leather */
    --color-primary-dark: #5D2E0C;
    --color-background: #FAF6F1;       /* Warm paper white */
    --color-surface: #FFFCF7;          /* Cream paper */
    --color-text: #2C1810;             /* Dark brown ink */
    --color-text-secondary: #6B5344;   /* Faded ink */
    --color-border: #E8DED4;           /* Paper edge */
    --color-accent: #C9A66B;           /* Gold foil accent */

    /* Category Colors */
    --color-middle-earth: #228B22;
    --color-wizarding: #800080;
    --color-panem: #DC143C;
    --color-lecarre: #4169E1;
    --color-king: #8B0000;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Typography - Literary fonts */
    --font-family: 'Georgia', 'Times New Roman', serif;
    --font-family-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --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;
    --font-size-4xl: 2.5rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Shadows - Soft, paper-like */
    --shadow-sm: 0 1px 3px rgba(44, 24, 16, 0.08);
    --shadow-md: 0 4px 12px rgba(44, 24, 16, 0.1);
    --shadow-lg: 0 8px 24px rgba(44, 24, 16, 0.12);

    /* Safe areas for iPhone notch/home indicator */
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --safe-left: env(safe-area-inset-left, 0px);
    --safe-right: env(safe-area-inset-right, 0px);
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    min-height: 100vh;
    padding-top: var(--safe-top);
    padding-bottom: var(--safe-bottom);
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: calc(var(--space-md) + var(--safe-left));
    padding-right: calc(var(--space-md) + var(--safe-right));
}

/* Typography */
h1, h2, h3, h4 {
    line-height: 1.3;
    font-weight: 400;
    font-family: var(--font-family);
    letter-spacing: -0.01em;
}

h1 { font-size: var(--font-size-3xl); font-style: italic; }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }

p {
    line-height: 1.7;
}

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

a:hover {
    text-decoration: underline;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 56px;
}

.nav-logo {
    font-size: var(--font-size-xl);
    font-weight: 400;
    font-style: italic;
    font-family: var(--font-family);
    color: var(--color-text);
}

.nav-logo:hover {
    text-decoration: none;
}

.nav-link {
    font-family: var(--font-family-sans);
    font-size: var(--font-size-sm);
    font-weight: 500;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    transition: background-color 0.2s;
}

.nav-link:hover {
    background-color: var(--color-background);
    text-decoration: none;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
    background: var(--color-surface);
    padding: var(--space-3xl) 0;
    text-align: center;
}

.hero-content {
    max-width: 600px;
}

.hero-icon {
    margin-bottom: var(--space-lg);
}

.hero-icon img {
    width: 100px;
    height: 100px;
    border-radius: 22px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.hero-tagline {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

.hero-cta {
    margin-bottom: var(--space-lg);
}

.app-store-badge {
    display: inline-block;
    transition: transform 0.2s;
}

.app-store-badge:hover {
    transform: scale(1.05);
}

.platform-notice {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    min-height: 1.5em;
}

/* ==========================================================================
   Screenshots Section
   ========================================================================== */

.screenshots {
    padding: var(--space-3xl) 0;
    background: var(--color-surface);
    overflow: hidden;
}

.screenshot-carousel {
    position: relative;
    max-width: 100%;
}

.screenshot-track {
    display: flex;
    gap: var(--space-lg);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding: var(--space-md) 0;
}

.screenshot-track::-webkit-scrollbar {
    display: none;
}

.screenshot-slide {
    flex: 0 0 auto;
    width: 280px;
    scroll-snap-align: center;
    text-align: center;
}

.screenshot-slide img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.screenshot-caption {
    margin-top: var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.screenshot-nav {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.screenshot-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    font-size: var(--font-size-lg);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.screenshot-btn:hover {
    background: var(--color-background);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.screenshot-dots {
    display: flex;
    gap: var(--space-sm);
}

.screenshot-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-border);
    cursor: pointer;
    transition: background 0.2s;
}

.screenshot-dot.active {
    background: var(--color-primary);
}

/* ==========================================================================
   Features Section
   ========================================================================== */

.features {
    padding: var(--space-3xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
}

.feature-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.feature-icon {
    margin-bottom: var(--space-md);
}

.feature-card h3 {
    margin-bottom: var(--space-sm);
}

.feature-card p {
    color: var(--color-text-secondary);
}

/* ==========================================================================
   How It Works Section
   ========================================================================== */

.how-it-works {
    background: var(--color-surface);
    padding: var(--space-3xl) 0;
}

.steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
}

.step {
    text-align: center;
}

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    font-size: var(--font-size-xl);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-md);
}

.step h3 {
    margin-bottom: var(--space-sm);
}

.step p {
    color: var(--color-text-secondary);
    max-width: 280px;
    margin: 0 auto;
}

/* ==========================================================================
   Built-in Journeys Section
   ========================================================================== */

.built-in-journeys {
    padding: var(--space-3xl) 0;
    background: var(--color-surface);
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    margin-top: calc(-1 * var(--space-lg));
    margin-bottom: var(--space-2xl);
    font-style: italic;
}

.journey-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
}

.journey-category {
    padding: var(--space-lg);
    background: var(--color-background);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-accent);
}

.journey-category h3 {
    font-size: var(--font-size-base);
    font-style: italic;
    margin-bottom: var(--space-sm);
    color: var(--color-primary);
}

.journey-category ul {
    list-style: none;
    font-family: var(--font-family-sans);
    font-size: var(--font-size-sm);
}

.journey-category li {
    padding: var(--space-xs) 0;
    color: var(--color-text-secondary);
}

.journey-category li::before {
    content: "—";
    margin-right: var(--space-sm);
    color: var(--color-border);
}

/* ==========================================================================
   CTA Section
   ========================================================================== */

.cta-section {
    padding: var(--space-3xl) 0;
    text-align: center;
}

.cta-section h2 {
    margin-bottom: var(--space-sm);
}

.cta-section p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
    display: inline-block;
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-md);
    font-family: var(--font-family-sans);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    min-height: 44px;
    min-width: 44px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.btn:hover {
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
}

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

.btn-secondary:hover {
    background: var(--color-border);
}

.btn-disabled {
    background: var(--color-border);
    color: var(--color-text-secondary);
    cursor: not-allowed;
}

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

.footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--space-xl) 0;
    text-align: center;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* ==========================================================================
   Quest Gallery Page
   ========================================================================== */

.page-header {
    background: var(--color-surface);
    padding: var(--space-xl) 0;
    border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
    margin-bottom: var(--space-sm);
}

.page-header p {
    color: var(--color-text-secondary);
}

/* iOS Notice Banner */
.ios-notice {
    background: #FFF3CD;
    border: 1px solid #FFECB5;
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-bottom: var(--space-xl);
    text-align: center;
}

.ios-notice p {
    color: #856404;
    margin: 0;
}

/* Quest Grid */
.quest-section {
    padding: var(--space-2xl) 0;
}

.category-title {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--color-border);
}

.quest-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

/* Quest Cards */
.quest-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform 0.2s, box-shadow 0.2s;
}

.quest-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.quest-card-accent {
    height: 6px;
}

.quest-card-content {
    padding: var(--space-lg);
}

.quest-card-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-sm);
}

.quest-card-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.quest-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.quest-card-meta span {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.quest-card-button {
    width: 100%;
}

/* Category-specific accent colors */
.accent-middle-earth { background-color: var(--color-middle-earth); }
.accent-wizarding { background-color: var(--color-wizarding); }
.accent-panem { background-color: var(--color-panem); }
.accent-lecarre { background-color: var(--color-lecarre); }
.accent-king { background-color: var(--color-king); }

/* ==========================================================================
   App Store Modal
   ========================================================================== */

.modal-overlay {
    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: var(--space-md);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

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

.modal {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    max-width: 400px;
    width: 100%;
    text-align: center;
    transform: scale(0.95);
    transition: transform 0.3s;
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal h3 {
    margin-bottom: var(--space-md);
}

.modal p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

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

/* ==========================================================================
   Tablet Styles (768px+)
   ========================================================================== */

@media (min-width: 768px) {
    .container {
        padding-left: var(--space-xl);
        padding-right: var(--space-xl);
    }

    .hero-icon img {
        width: 120px;
        height: 120px;
        border-radius: 27px;
    }

    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .steps-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .quest-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .modal-buttons {
        flex-direction: row;
        justify-content: center;
    }

    .journey-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ==========================================================================
   Desktop Styles (1024px+)
   ========================================================================== */

@media (min-width: 1024px) {
    .container {
        padding-left: var(--space-2xl);
        padding-right: var(--space-2xl);
    }

    h1 { font-size: var(--font-size-4xl); }

    .hero {
        padding: var(--space-3xl) 0 var(--space-3xl);
    }

    .quest-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .feature-card {
        padding: var(--space-2xl);
    }

    .journey-list {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}