/*
 * Tiramisu Website Styles
 * Design System: Musical layers theme with Tiramisu color palette
 */

/* ============================================================================
   VARIABLES & RESET
   ============================================================================ */

:root {
    /* Colors matching Tiramisu app exactly */
    --bg-primary: #FAF8F5;         /* App background */
    --bg-secondary: #FFF9E6;       /* Cream sections */
    --bg-elevated: white;          /* White cards */

    /* Stem colors (Tiramisu layers) */
    --color-vocals: #6B4423;       /* Cocoa brown */
    --color-drums: #D4A574;        /* Ladyfinger tan */
    --color-bass: #3E2723;         /* Coffee brown */
    --color-other: #FFF9E6;        /* Cream */

    /* Primary actions (Cocoa/Coffee tones) */
    --color-primary: #7A9B4D;      /* Green button */
    --color-primary-hover: #8BB05F; /* Lighter green */

    /* Text (Espresso tones) */
    --text-primary: #2C1810;       /* Dark text */
    --text-secondary: #6B4423;     /* Cocoa brown */
    --text-tertiary: #8B5A3C;      /* Medium brown */

    /* UI */
    --border: #E8DCC8;             /* Light border */
    --success: #7A9B4D;            /* Green */

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    --spacing-xxxl: 64px;

    /* Typography */
    --font-primary: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Consolas', monospace;

    /* Transitions */
    --transition-fast: 150ms ease-out;
    --transition-normal: 250ms ease-out;
    --transition-slow: 400ms ease-out;
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ============================================================================
   TYPOGRAPHY
   ============================================================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

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

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

/* ============================================================================
   NAVIGATION
   ============================================================================ */

.navbar {
    background: var(--bg-elevated);
    backdrop-filter: blur(20px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 3px rgba(74, 37, 17, 0.05);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

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

.nav-logo {
    width: 40px;
    height: 40px;
    border-radius: 8px;
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

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

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.support-btn {
    background: var(--color-primary);
    color: #FFF8DC !important;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 8px;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.support-btn:hover {
    background: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(139, 90, 60, 0.3);
}

/* ============================================================================
   HERO SECTION
   ============================================================================ */

.hero {
    padding: var(--spacing-xxxl) 0;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxxl);
    align-items: center;
}

.hero-title {
    background: linear-gradient(135deg, #6B4423, #D4A574);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
    font-weight: 800;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.hero-caption {
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

/* ============================================================================
   BUTTONS
   ============================================================================ */

.btn {
    display: inline-block;
    padding: 16px 32px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
    text-align: center;
}

.btn-primary {
    background: var(--color-primary);
    color: #FFF8DC;
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(139, 90, 60, 0.3);
}

.btn-secondary {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 2px solid var(--border);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-download {
    background: var(--color-primary);
    color: white;
    font-size: 1.1rem;
    padding: 20px 40px;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.btn-download:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(139, 90, 60, 0.4);
}

.download-icon {
    font-size: 1.5rem;
}

/* ============================================================================
   LAYER ICONS DISPLAY
   ============================================================================ */

.layers-container {
    width: 100%;
    padding: var(--spacing-xl) 0;
}

.layer-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    max-width: 500px;
    margin: 0 auto;
}

.layer-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.layer-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(107, 68, 35, 0.15);
    border-color: var(--color-primary);
}

.layer-icon-wrapper {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-sm);
    background: var(--bg-elevated);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.layer-icon {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.layer-name {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.layer-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.layers-hint {
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.9rem;
    margin-top: var(--spacing-lg);
    opacity: 0.7;
}

/* ============================================================================
   FEATURES SECTION
   ============================================================================ */

.features {
    padding: var(--spacing-xxxl) 0;
    background: var(--bg-secondary);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
    color: var(--text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--bg-elevated);
    padding: var(--spacing-xl);
    border-radius: 16px;
    border: 1px solid var(--border);
    transition: all var(--transition-fast);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================================================
   HOW IT WORKS SECTION
   ============================================================================ */

.how-it-works {
    padding: var(--spacing-xxxl) 0;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.step {
    text-align: center;
    padding: var(--spacing-lg);
}

.step-number {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    background: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

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

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

/* ============================================================================
   DOWNLOAD SECTION
   ============================================================================ */

.download {
    padding: var(--spacing-xxxl) 0;
    background: var(--bg-secondary);
}

.download-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.download-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xl);
}

.download-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
}

.download-info {
    text-align: left;
}

.download-info h3 {
    margin-bottom: var(--spacing-xs);
}

.download-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.download-size {
    color: var(--text-tertiary);
    font-size: 0.85rem !important;
}

.download-requirements {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    text-align: left;
}

.download-requirements h4 {
    margin-bottom: var(--spacing-sm);
}

.download-requirements ul {
    list-style: none;
    color: var(--text-secondary);
}

.download-requirements li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
}

.download-requirements li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: 700;
}

.installation-note {
    background: rgba(232, 117, 180, 0.1);
    border: 1px solid var(--color-primary);
    border-radius: 12px;
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    text-align: left;
}

.installation-note h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.installation-note p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.text-link {
    color: var(--color-primary);
    font-weight: 600;
}

/* ============================================================================
   USE CASES SECTION
   ============================================================================ */

.use-cases {
    padding: var(--spacing-xxxl) 0;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.use-case {
    background: var(--bg-elevated);
    padding: var(--spacing-xl);
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all var(--transition-fast);
}

.use-case:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
}

.use-case h3 {
    margin-bottom: var(--spacing-sm);
}

.use-case p {
    color: var(--text-secondary);
}

/* ============================================================================
   SUPPORT SECTION
   ============================================================================ */

.support {
    padding: var(--spacing-xxxl) 0;
    background: var(--bg-secondary);
}

.support-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.support-subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    font-size: 1.1rem;
}

.coffee-widget {
    margin: var(--spacing-xl) 0;
    display: flex;
    justify-content: center;
}

.support-caption {
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

/* ============================================================================
   FOOTER
   ============================================================================ */

.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.footer-section p,
.footer-section ul {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin: var(--spacing-xs) 0;
}

.footer-section a {
    color: var(--text-secondary);
}

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

.footer-license {
    color: var(--color-success) !important;
    font-weight: 600;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border);
    color: var(--text-tertiary);
    font-size: 0.85rem;
}

.footer-bottom p {
    margin: var(--spacing-xs) 0;
}

/* ============================================================================
   RESPONSIVE
   ============================================================================ */

@media (max-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .layer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }

    .layer-icon-wrapper {
        width: 64px;
        height: 64px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .nav-links {
        gap: var(--spacing-sm);
        font-size: 0.9rem;
    }

    .download-card {
        flex-direction: column;
        text-align: center;
    }

    .download-info {
        text-align: center;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 16px;
        --spacing-xl: 24px;
        --spacing-xxl: 32px;
        --spacing-xxxl: 48px;
    }

    .nav-links {
        flex-wrap: wrap;
    }

    .features-grid,
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
}