/* ================================================
   Stone Verse: Rockword - Main Stylesheet
   Ancient Scholarly Mystery Theme
   Stone Grey & Moss Amber Color Scheme
   ================================================ */

/* ==================== CSS Variables ==================== */
:root {
    /* Color Scheme: Stone Grey & Moss Amber */
    --color-stone-dark: #3E3E3E;
    --color-stone-medium: #6B7280;
    --color-stone-light: #9CA3AF;
    --color-stone-lighter: #D1D5DB;
    --color-stone-bg: #F3F4F6;
    --color-moss-amber: #A67C52;
    --color-moss-amber-light: #C9A26E;
    --color-moss-amber-dark: #8B6239;
    --color-accent-ochre: #D4A574;
    --color-white: #FFFFFF;
    --color-text-dark: #1F2937;
    --color-text-medium: #4B5563;
    
    /* Typography */
    --font-serif: Georgia, 'Times New Roman', serif;
    --font-sans: -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;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);
    --shadow-stone: 2px 2px 8px rgba(62, 62, 62, 0.3), inset 1px 1px 3px rgba(255, 255, 255, 0.2);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

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

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

a {
    color: var(--color-moss-amber);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-moss-amber-dark);
}

a:active {
    color: var(--color-moss-amber-light);
}

/* ==================== Sticky Header ==================== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--color-stone-lighter);
    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-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

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

.header-title {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-stone-dark);
    display: none;
}

.header-nav {
    display: none;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-medium);
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-moss-amber);
}

.cta-button {
    padding: 0.5rem 1rem;
    background: var(--color-moss-amber);
    color: var(--color-white);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
}

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

.cta-button:active {
    transform: translateY(0);
}

.header-cta-mobile {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-moss-amber);
    color: var(--color-white);
    transition: all var(--transition-fast);
}

.header-cta-mobile:hover {
    background: var(--color-moss-amber-dark);
    transform: scale(1.05);
}

.header-cta-mobile:active {
    transform: scale(0.95);
}

/* ==================== Hero Section ==================== */
.hero {
    padding: var(--spacing-2xl) var(--spacing-sm);
    background: linear-gradient(135deg, #F9FAFB 0%, #E5E7EB 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        repeating-linear-gradient(90deg, transparent, transparent 49px, rgba(107, 114, 128, 0.05) 49px, rgba(107, 114, 128, 0.05) 50px),
        repeating-linear-gradient(0deg, transparent, transparent 49px, rgba(107, 114, 128, 0.05) 49px, rgba(107, 114, 128, 0.05) 50px);
    pointer-events: none;
    opacity: 0.3;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    width: 100%;
}

.hero-icon {
    width: 96px;
    height: 96px;
    margin: 0 auto var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-stone);
    animation: iconFloat 3s ease-in-out infinite;
}

@keyframes iconFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.hero-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-stone-dark);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.02em;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-moss-amber);
    margin-bottom: var(--spacing-md);
}

.hero-description {
    font-size: 1rem;
    color: var(--color-text-medium);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.hero-visual {
    width: 100%;
    margin-top: var(--spacing-lg);
}

.hero-banner {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 3px solid var(--color-stone-lighter);
}

/* ==================== Store Buttons (Carved Stone Tablet Style) ==================== */
.store-button,
.store-button-large {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.875rem 1.25rem;
    background: linear-gradient(135deg, var(--color-stone-medium) 0%, var(--color-stone-dark) 100%);
    border: 3px solid var(--color-stone-light);
    border-radius: var(--radius-lg);
    color: var(--color-white);
    font-family: var(--font-serif);
    font-weight: 600;
    min-height: 56px;
    transition: all var(--transition-medium);
    box-shadow: 
        var(--shadow-md),
        inset 2px 2px 4px rgba(255, 255, 255, 0.1),
        inset -2px -2px 4px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
}

.store-button:hover,
.store-button-large:hover {
    transform: translateY(-3px);
    box-shadow: 
        0 12px 24px rgba(0, 0, 0, 0.2),
        inset 2px 2px 4px rgba(255, 255, 255, 0.15),
        inset -2px -2px 4px rgba(0, 0, 0, 0.25);
    border-color: var(--color-moss-amber-light);
}

.store-button:active,
.store-button-large:active {
    transform: translateY(-1px);
}

.store-button-large {
    padding: 1rem 1.5rem;
    min-height: 64px;
}

.store-button.google-play,
.store-button-large.google-play {
    background: linear-gradient(135deg, var(--color-moss-amber) 0%, var(--color-moss-amber-dark) 100%);
}

.store-icon {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
}

.store-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

.store-label {
    font-size: 0.75rem;
    font-weight: 400;
    opacity: 0.9;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.store-name {
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

/* Coming Soon Button Style */
.store-button.coming-soon,
.store-button-large.coming-soon {
    background: #2a2a2a;
    border-color: #4a4a4a;
    opacity: 0.55;
    filter: grayscale(0.6);
    cursor: not-allowed;
    position: relative;
}

.store-button.coming-soon:hover,
.store-button-large.coming-soon:hover {
    transform: none;
    box-shadow: 
        var(--shadow-md),
        inset 2px 2px 4px rgba(255, 255, 255, 0.1),
        inset -2px -2px 4px rgba(0, 0, 0, 0.2);
    border-color: #4a4a4a;
}

.coming-soon-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--color-stone-medium);
    color: var(--color-white);
    font-size: 0.625rem;
    font-weight: 700;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    box-shadow: var(--shadow-sm);
}

/* ==================== Features Section ==================== */
.features {
    padding: var(--spacing-2xl) var(--spacing-sm);
    background: var(--color-white);
}

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

.section-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-stone-dark);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    letter-spacing: 0.02em;
}

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

.feature-card {
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, #FAFAFA 0%, #F3F4F6 100%);
    border: 3px solid var(--color-stone-lighter);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-stone);
    transition: all var(--transition-medium);
    opacity: 0;
    transform: translateY(20px);
}

.feature-card.revealed {
    opacity: 1;
    transform: translateY(0);
}

.feature-card:hover {
    border-color: var(--color-moss-amber-light);
    box-shadow: 
        var(--shadow-lg),
        inset 1px 1px 3px rgba(255, 255, 255, 0.3);
    transform: translateY(-4px);
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    filter: grayscale(0.3);
}

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

.feature-description {
    font-size: 0.9375rem;
    color: var(--color-text-medium);
    line-height: 1.7;
}

/* ==================== Download CTA Section ==================== */
.download-cta {
    padding: var(--spacing-2xl) var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-stone-medium) 0%, var(--color-stone-dark) 100%);
    color: var(--color-white);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.download-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(166, 124, 82, 0.2) 0%, transparent 70%);
    pointer-events: none;
}

.download-container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.download-title {
    font-family: var(--font-serif);
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.02em;
}

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

.download-buttons-large {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-width: 400px;
    margin: 0 auto;
}

/* ==================== Floating Mobile CTA ==================== */
.floating-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 99;
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(100%);
    transition: transform var(--transition-medium);
}

.floating-cta.visible {
    transform: translateY(0);
}

.floating-cta-button {
    display: block;
    width: 100%;
    padding: 1rem;
    background: var(--color-moss-amber);
    color: var(--color-white);
    font-weight: 700;
    font-size: 1.125rem;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
}

.floating-cta-button:hover {
    background: var(--color-moss-amber-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.floating-cta-button:active {
    transform: translateY(0);
}

/* ==================== About Section ==================== */
.about {
    padding: var(--spacing-2xl) var(--spacing-sm);
    background: var(--color-white);
}

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

.about-text {
    font-size: 1rem;
    color: var(--color-text-medium);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

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

.contact-link {
    color: var(--color-moss-amber);
    font-weight: 600;
    text-decoration: underline;
}

.contact-link:hover {
    color: var(--color-moss-amber-dark);
}

/* ==================== Footer ==================== */
.footer {
    padding: var(--spacing-xl) var(--spacing-sm);
    background: var(--color-stone-dark);
    color: var(--color-stone-lighter);
}

.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;
    align-items: center;
    gap: var(--spacing-xs);
}

.footer-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
}

.footer-name {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-white);
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
}

.footer-link {
    color: var(--color-stone-lighter);
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-moss-amber-light);
}

.footer-contact {
    font-size: 0.9375rem;
}

.footer-contact a {
    color: var(--color-moss-amber-light);
}

.footer-copyright {
    font-size: 0.875rem;
    opacity: 0.8;
    margin-top: var(--spacing-sm);
}

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

/* Tablet (768px+) */
@media (min-width: 768px) {
    .header {
        height: 64px;
    }
    
    .header-title {
        display: block;
    }
    
    .header-nav {
        display: flex;
    }
    
    .header-cta-mobile {
        display: none;
    }
    
    .hero {
        padding: var(--spacing-2xl) var(--spacing-md);
    }
    
    .hero-container {
        flex-direction: row;
        text-align: left;
        align-items: center;
        gap: var(--spacing-xl);
    }
    
    .hero-content {
        flex: 1;
    }
    
    .hero-icon {
        margin-left: 0;
        margin-right: 0;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-description {
        font-size: 1.125rem;
        margin-left: 0;
    }
    
    .download-buttons {
        flex-direction: row;
    }
    
    .hero-visual {
        flex: 1;
        margin-top: 0;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
    
    .download-buttons-large {
        flex-direction: row;
        max-width: 100%;
        justify-content: center;
    }
    
    .floating-cta {
        display: none;
    }
}

/* Desktop (1024px+) */
@media (min-width: 1024px) {
    .hero {
        padding: 4rem var(--spacing-lg);
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-container {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
    
    .footer-links {
        justify-content: flex-start;
    }
}