/* ============================================
   Steam Slide: Clockwork Merge
   Victorian Mechanical Steampunk Theme
   ============================================ */

/* CSS Variables - Bronze Clockwork Color Scheme */
:root {
    /* Primary Colors - Bronze & Brass */
    --color-primary: #B8860B;        /* Dark goldenrod brass */
    --color-primary-light: #DAA520;  /* Goldenrod */
    --color-primary-dark: #8B6914;   /* Darker brass */
    
    /* Secondary Colors - Copper & Rust */
    --color-secondary: #CD7F32;      /* Bronze */
    --color-secondary-light: #E9967A; /* Light copper */
    --color-secondary-dark: #8B4513;  /* Saddle brown */
    
    /* Accent Colors */
    --color-accent: #A0522D;         /* Sienna rust */
    --color-accent-light: #D2691E;   /* Chocolate */
    
    /* Neutral Colors */
    --color-bg: #FFF8DC;             /* Cornsilk parchment */
    --color-bg-dark: #F5E6D3;        /* Aged paper */
    --color-surface: #FFFEF9;        /* Off-white */
    --color-text: #2F2519;           /* Dark brown */
    --color-text-light: #5C4A3A;     /* Medium brown */
    
    /* Functional Colors */
    --color-disabled: #2a2a2a;       /* Neutral gray for disabled state */
    --color-shadow: rgba(139, 69, 19, 0.15);
    --color-overlay: rgba(47, 37, 25, 0.05);
    
    /* Typography */
    --font-display: Georgia, 'Times New Roman', serif;
    --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Borders */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    --border-width: 2px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px var(--color-shadow);
    --shadow-md: 0 4px 8px var(--color-shadow);
    --shadow-lg: 0 8px 16px var(--color-shadow);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================
   Reset & Base Styles
   ============================================ */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ============================================
   Header - Sticky Navigation
   ============================================ */

.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--color-surface);
    border-bottom: var(--border-width) solid var(--color-primary);
    box-shadow: var(--shadow-sm);
    height: 48px;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.header-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--border-radius-sm);
}

.header-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-primary-dark);
}

.header-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-link {
    display: none;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-light);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-primary);
    background-color: var(--color-overlay);
}

.nav-cta {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary);
    color: var(--color-surface);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.nav-cta:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Desktop Header */
@media (min-width: 768px) {
    .header {
        height: 64px;
    }
    
    .header-container {
        padding: 0 var(--spacing-lg);
    }
    
    .nav-link {
        display: block;
    }
    
    .nav-cta {
        display: none;
    }
}

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

.hero {
    padding: var(--spacing-xl) var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-dark) 100%);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.hero-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.hero-icon {
    width: 120px;
    height: 120px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    border: 3px solid var(--color-primary);
    animation: gearRotate 20s linear infinite;
}

@keyframes gearRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.hero-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    line-height: 1.2;
    margin-bottom: var(--spacing-xs);
}

.hero-subtitle {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-secondary-dark);
    font-style: italic;
}

.hero-description {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text-light);
    max-width: 600px;
}

.hero-visual {
    width: 100%;
    max-width: 500px;
}

.hero-banner {
    width: 100%;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    border: var(--border-width) solid var(--color-secondary);
}

/* Desktop Hero */
@media (min-width: 768px) {
    .hero {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }
    
    .hero-container {
        flex-direction: row;
        align-items: center;
        gap: var(--spacing-2xl);
    }
    
    .hero-content {
        flex: 1;
        text-align: left;
        align-items: flex-start;
    }
    
    .hero-icon {
        width: 100px;
        height: 100px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.5rem;
    }
    
    .hero-visual {
        flex: 1;
    }
}

@media (min-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-subtitle {
        font-size: 1.75rem;
    }
}

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

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 100%;
    max-width: 400px;
}

.btn-download {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    font-weight: 600;
    transition: all var(--transition-base);
    min-height: 56px;
    border: var(--border-width) solid var(--color-primary);
    position: relative;
    overflow: hidden;
}

.btn-google-play {
    background-color: var(--color-primary-dark);
    color: var(--color-surface);
    border-color: var(--color-primary);
}

.btn-google-play:hover,
.btn-google-play:active {
    background-color: var(--color-primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-app-store {
    background-color: var(--color-disabled);
    color: var(--color-surface);
    border-color: var(--color-disabled);
    opacity: 0.55;
    filter: grayscale(0.6);
    cursor: not-allowed;
}

.btn-app-store:disabled {
    pointer-events: none;
}

.store-icon {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
}

.btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
}

.btn-label {
    font-size: 0.625rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    opacity: 0.9;
}

.btn-store {
    font-size: 1rem;
    font-weight: 700;
    line-height: 1;
}

.coming-soon-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    background-color: var(--color-accent);
    color: var(--color-surface);
    font-size: 0.625rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.download-buttons-large .btn-download {
    min-height: 64px;
}

/* Desktop Download Buttons */
@media (min-width: 768px) {
    .download-buttons {
        flex-direction: row;
        max-width: none;
    }
    
    .btn-download {
        flex: 1;
        justify-content: center;
    }
}

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

.features {
    padding: var(--spacing-2xl) var(--spacing-sm);
    background-color: var(--color-surface);
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-light);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    font-style: italic;
}

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

.feature-card {
    padding: var(--spacing-lg);
    background-color: var(--color-bg);
    border: var(--border-width) solid var(--color-secondary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    position: relative;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--border-radius-lg);
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: -1;
}

.feature-card:hover {
    transform: translateY(-4px) rotate(0.5deg);
    box-shadow: var(--shadow-lg);
}

.feature-card:hover::before {
    opacity: 0.3;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    display: inline-block;
    animation: gearPulse 3s ease-in-out infinite;
}

@keyframes gearPulse {
    0%, 100% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.05) rotate(5deg); }
}

.feature-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-xs);
}

.feature-description {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text-light);
}

/* Desktop Features */
@media (min-width: 768px) {
    .features {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .section-title {
        font-size: 2.5rem;
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

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

.screenshots {
    padding: var(--spacing-2xl) var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg) 100%);
}

.screenshots-container {
    max-width: 1200px;
    margin: 0 auto;
}

.screenshots-carousel {
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.screenshots-carousel::-webkit-scrollbar {
    display: none;
}

.screenshots-track {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
}

.screenshot-item {
    flex: 0 0 280px;
    scroll-snap-align: center;
    scroll-snap-stop: always;
}

.screenshot-item img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    border: var(--border-width) solid var(--color-secondary);
    transition: transform var(--transition-base);
}

.screenshot-item:hover img {
    transform: scale(1.03) rotate(-1deg);
}

/* Desktop Screenshots */
@media (min-width: 768px) {
    .screenshots {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }
    
    .screenshots-track {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .screenshot-item {
        flex: 0 0 calc(50% - var(--spacing-md));
        max-width: 300px;
    }
}

@media (min-width: 1024px) {
    .screenshot-item {
        flex: 0 0 calc(25% - var(--spacing-md));
    }
}

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

.download-cta {
    padding: var(--spacing-2xl) var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-secondary-dark) 100%);
    color: var(--color-surface);
    text-align: center;
}

.download-container {
    max-width: 1200px;
    margin: 0 auto;
}

.download-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.download-subtitle {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
}

/* Desktop Download CTA */
@media (min-width: 768px) {
    .download-cta {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }
    
    .download-title {
        font-size: 3rem;
    }
    
    .download-subtitle {
        font-size: 1.25rem;
    }
}

/* ============================================
   Floating Mobile CTA
   ============================================ */

.floating-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-sm);
    background-color: var(--color-surface);
    border-top: var(--border-width) solid var(--color-primary);
    box-shadow: 0 -4px 8px var(--color-shadow);
    z-index: 999;
    display: block;
}

.floating-cta-button {
    display: block;
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--color-primary);
    color: var(--color-surface);
    font-size: 1.125rem;
    font-weight: 700;
    text-align: center;
    border-radius: var(--border-radius-md);
    border: var(--border-width) solid var(--color-primary-dark);
    transition: all var(--transition-base);
}

.floating-cta-button:active {
    background-color: var(--color-primary-dark);
    transform: scale(0.98);
}

/* Hide on desktop */
@media (min-width: 768px) {
    .floating-cta {
        display: none;
    }
}

/* ============================================
   About Section
   ============================================ */

.about {
    padding: var(--spacing-2xl) var(--spacing-sm);
    background-color: var(--color-surface);
}

.about-container {
    max-width: 800px;
    margin: 0 auto;
}

.about-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.about-text {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text);
}

.about-contact {
    font-size: 1rem;
    color: var(--color-text);
    margin-top: var(--spacing-sm);
}

.about-email {
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: underline;
    transition: color var(--transition-fast);
}

.about-email:hover {
    color: var(--color-primary-dark);
}

/* Desktop About */
@media (min-width: 768px) {
    .about {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }
    
    .about-text {
        font-size: 1.125rem;
    }
}

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

.footer {
    padding: var(--spacing-xl) var(--spacing-sm);
    background-color: var(--color-primary-dark);
    color: var(--color-surface);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    text-align: center;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.footer-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-sm);
}

.footer-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
}

.footer-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-link {
    font-size: 0.875rem;
    opacity: 0.9;
    transition: opacity var(--transition-fast);
}

.footer-link:hover {
    opacity: 1;
    text-decoration: underline;
}

.footer-separator {
    opacity: 0.6;
}

.footer-contact {
    font-size: 0.875rem;
}

.footer-email {
    text-decoration: underline;
    opacity: 0.9;
    transition: opacity var(--transition-fast);
}

.footer-email:hover {
    opacity: 1;
}

.footer-copyright {
    font-size: 0.75rem;
    opacity: 0.8;
}

/* Desktop Footer */
@media (min-width: 768px) {
    .footer {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
}