/* TuneKit Landing - Premium Design */

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

:root {
    /* Dark mode (default) */
    --bg: #050507;
    --bg-elevated: #0a0a0f;
    --bg-card: #111118;
    --bg-card-hover: #16161f;
    --border: #1e1e2a;
    --border-hover: #2a2a3a;
    --text: #fafafa;
    --text-secondary: #9898a8;
    --text-muted: #5a5a6e;

    --accent: #3b82f6;
    --accent-light: #60a5fa;
    --accent-dark: #2563eb;
    --accent-glow: rgba(59, 130, 246, 0.2);

    --purple: #8b5cf6;
    --purple-light: #a78bfa;
    --pink: #ec4899;
    --green: #10b981;
}

/* Light mode */
[data-theme="light"] {
    --bg: #f8fafc;
    --bg-elevated: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --border: #e2e8f0;
    --border-hover: #cbd5e1;
    --text: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;

    --accent: #2563eb;
    --accent-light: #3b82f6;
    --accent-dark: #1d4ed8;
    --accent-glow: rgba(37, 99, 235, 0.15);

    --purple: #7c3aed;
    --purple-light: #8b5cf6;
    --pink: #db2777;
    --green: #059669;
}

[data-theme="light"] .bg-gradient {
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(59, 130, 246, 0.08), transparent),
        radial-gradient(ellipse 60% 40% at 80% 50%, rgba(139, 92, 246, 0.06), transparent),
        radial-gradient(ellipse 50% 30% at 20% 80%, rgba(236, 72, 153, 0.04), transparent);
}

[data-theme="light"] .bg-grid {
    background-image:
        linear-gradient(rgba(0, 0, 0, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 0, 0, 0.03) 1px, transparent 1px);
}

[data-theme="light"] .orb-1 {
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15), transparent 70%);
}

[data-theme="light"] .orb-2 {
    background: radial-gradient(circle, rgba(139, 92, 246, 0.12), transparent 70%);
}

[data-theme="light"] .orb-3 {
    background: radial-gradient(circle, rgba(236, 72, 153, 0.1), transparent 70%);
}

[data-theme="light"] .terminal {
    box-shadow:
        0 0 0 1px rgba(0, 0, 0, 0.05),
        0 20px 50px -20px rgba(0, 0, 0, 0.15),
        0 0 100px -50px var(--accent-glow);
}

[data-theme="light"] .gradient-text {
    background: linear-gradient(135deg, var(--accent) 0%, var(--purple) 50%, var(--pink) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    overflow-x: hidden;
}

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

/* ============================================
   ANIMATED BACKGROUND
   ============================================ */

.bg-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(59, 130, 246, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 80% 50%, rgba(139, 92, 246, 0.1), transparent),
        radial-gradient(ellipse 50% 30% at 20% 80%, rgba(236, 72, 153, 0.08), transparent);
    pointer-events: none;
    z-index: -3;
}

.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
    background-size: 80px 80px;
    pointer-events: none;
    z-index: -2;
    mask-image: radial-gradient(ellipse 100% 60% at 50% 0%, black 30%, transparent 70%);
}

/* Floating Orbs */
.floating-orbs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.3), transparent 70%);
    top: -200px;
    left: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.25), transparent 70%);
    top: 40%;
    right: -150px;
    animation-delay: -7s;
    animation-duration: 25s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.2), transparent 70%);
    bottom: -100px;
    left: 30%;
    animation-delay: -14s;
    animation-duration: 22s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(20px, 10px) scale(1.02); }
}

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

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 48px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 2px;
    font-weight: 700;
    font-size: 20px;
    transition: opacity 0.2s;
}

.logo:hover { opacity: 0.8; }

.logo-icon {
    display: flex;
    align-items: center;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    color: var(--text-muted);
    transition: all 0.2s;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
}

.nav-link:hover {
    color: var(--text);
    border-color: var(--border-hover);
    background: var(--bg-card);
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--accent);
    color: white;
    font-weight: 600;
    font-size: 14px;
    border-radius: 10px;
    transition: all 0.2s;
}

.nav-btn:hover {
    background: var(--accent-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 20px var(--accent-glow);
}

/* Theme Toggle */
.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg-elevated);
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover {
    background: var(--bg-card);
    border-color: var(--border-hover);
    color: var(--text);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
    transition: all 0.3s ease;
}

.theme-toggle .sun-icon {
    position: absolute;
    transform: rotate(-90deg) scale(0);
    opacity: 0;
}

.theme-toggle .moon-icon {
    position: absolute;
    transform: rotate(0deg) scale(1);
    opacity: 1;
}

[data-theme="light"] .theme-toggle .sun-icon {
    transform: rotate(0deg) scale(1);
    opacity: 1;
}

[data-theme="light"] .theme-toggle .moon-icon {
    transform: rotate(90deg) scale(0);
    opacity: 0;
}

/* ============================================
   MAIN CONTENT
   ============================================ */

.main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px 24px 80px;
}

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

.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding: 60px 0 80px;
    min-height: 70vh;
}

.hero-content {
    max-width: 520px;
}

.badge-row {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
}

.badge-glow {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.3);
    color: var(--accent-light);
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--green);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.hero h1 {
    font-size: clamp(40px, 5vw, 56px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
}

.hero-line {
    display: block;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-light) 0%, var(--purple-light) 50%, var(--pink) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

.highlight {
    color: var(--text);
    font-weight: 500;
}

.hero-cta {
    display: flex;
    gap: 12px;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 24px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: white;
    font-weight: 600;
    font-size: 15px;
    border-radius: 12px;
    transition: all 0.25s;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
}

.btn-glow {
    box-shadow: 0 0 30px var(--accent-glow);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 15px;
    border-radius: 12px;
    transition: all 0.2s;
}

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

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
}

/* Terminal Preview */
.terminal-wrapper {
    position: relative;
}

.terminal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.03),
        0 20px 50px -20px rgba(0, 0, 0, 0.5),
        0 0 100px -50px var(--accent-glow);
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
}

.terminal-dots {
    display: flex;
    gap: 6px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot-red { background: #ff5f57; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #28c840; }

.terminal-title {
    font-size: 12px;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

.terminal-body {
    padding: 20px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    line-height: 1.8;
}

.code-line {
    min-height: 20px;
}

.code-indent {
    padding-left: 24px;
}

.code-comment { color: var(--text-muted); }
.code-keyword { color: var(--pink); }
.code-module { color: var(--accent-light); }
.code-var { color: var(--text); }
.code-func { color: #fbbf24; }
.code-string { color: var(--green); }
.code-bool { color: var(--purple-light); }
.code-muted { color: var(--text-muted); }
.code-cmd { color: var(--accent-light); font-weight: 500; }
.code-flag { color: var(--purple-light); }
.code-highlight { color: var(--text); font-weight: 600; }

.code-output-dim {
    color: var(--text-secondary);
    padding-left: 16px;
}

.code-output {
    margin-top: 8px;
    padding: 8px 12px;
    background: rgba(16, 185, 129, 0.1);
    border-radius: 6px;
    border-left: 3px solid var(--green);
}

.code-success { color: var(--green); }

.terminal-cursor {
    display: inline-block;
    width: 8px;
    height: 16px;
    background: var(--accent);
    margin-left: 4px;
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.terminal-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, var(--accent-glow), transparent 60%);
    z-index: -1;
    filter: blur(40px);
    opacity: 0.5;
}

/* ============================================
   STATS BAR
   ============================================ */

.stats-bar {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    padding: 28px 40px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 16px;
    margin-bottom: 100px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-value {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-light), var(--purple-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

/* ============================================
   SECTION HEADERS
   ============================================ */

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-tag {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(28px, 4vw, 36px);
    font-weight: 700;
    letter-spacing: -0.02em;
}

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

.how-it-works {
    padding: 60px 0 100px;
}

.steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 16px;
}

.step {
    flex: 1;
    max-width: 280px;
    padding: 32px 28px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 20px;
    transition: all 0.3s;
    position: relative;
}

.step:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(59, 130, 246, 0.1);
}

.step-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.step-icon-accent {
    background: linear-gradient(135deg, var(--accent) 0%, var(--purple) 100%);
    border: none;
    color: white;
}

.step-number {
    font-size: 11px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.1em;
    margin-bottom: 12px;
}

.step h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}

.step p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.step-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    padding-top: 50px;
    opacity: 0.4;
}

/* ============================================
   FEATURES GRID (2x2)
   ============================================ */

.features {
    padding: 60px 0 100px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    max-width: 800px;
    margin: 0 auto;
}

.feature-card {
    padding: 28px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 16px;
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.08);
}

.feature-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    margin-bottom: 16px;
}

.feature-icon-purple {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(139, 92, 246, 0.05));
    color: var(--purple-light);
}

.feature-icon-colab {
    background: rgba(251, 188, 4, 0.1);
}

.feature-icon-blue {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(59, 130, 246, 0.05));
    color: var(--accent-light);
}

.feature-icon-green {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(16, 185, 129, 0.05));
    color: var(--green);
}

.feature-card h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* ============================================
   MODELS
   ============================================ */

.models {
    padding: 60px 0 100px;
}

.models-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 800px;
    margin: 0 auto;
}

.model-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 28px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 16px;
    transition: all 0.3s;
}

.model-row:hover {
    border-color: var(--border-hover);
    background: var(--bg-card);
}

.model-info {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
}

.model-header {
    display: flex;
    align-items: center;
    gap: 12px;
}

.model-name {
    font-size: 17px;
    font-weight: 600;
}

.model-badge {
    padding: 4px 10px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.03em;
}

.model-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

.model-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}

.model-size {
    padding: 8px 16px;
    background: linear-gradient(135deg, var(--accent-glow), rgba(139, 92, 246, 0.1));
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-light);
}

.model-link-icon {
    color: var(--text-muted);
    opacity: 0.5;
    transition: opacity 0.2s;
}

.model-row:hover .model-link-icon {
    opacity: 1;
}

/* ============================================
   CTA SECTION
   ============================================ */

.cta-section {
    padding: 40px 0 60px;
}

.cta-card {
    text-align: center;
    padding: 60px 40px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 24px;
    position: relative;
    overflow: hidden;
}

.cta-glow {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 400px;
    height: 200px;
    background: radial-gradient(ellipse, var(--accent-glow), transparent 70%);
    filter: blur(60px);
    z-index: 0;
}

.cta-card h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.cta-card p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 28px;
    position: relative;
    z-index: 1;
}

.cta-card .btn-primary {
    position: relative;
    z-index: 1;
}

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

.footer {
    border-top: 1px solid var(--border);
    padding: 24px 48px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-brand {
    font-weight: 600;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    font-size: 14px;
    color: var(--text-secondary);
    transition: color 0.2s;
}

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

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

@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
        padding: 40px 0 60px;
    }

    .hero-content {
        max-width: 100%;
    }

    .badge-row {
        justify-content: center;
    }

    .hero-cta {
        justify-content: center;
    }

    .terminal-wrapper {
        max-width: 500px;
        margin: 0 auto;
    }

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

}

@media (max-width: 768px) {
    .nav {
        padding: 16px 20px;
    }

    .main {
        padding: 16px 20px 60px;
    }

    .hero h1 {
        font-size: 36px;
    }

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

    .btn-primary, .btn-secondary {
        width: 100%;
        justify-content: center;
    }

    .stats-bar {
        flex-wrap: wrap;
        gap: 24px;
        padding: 24px;
    }

    .stat-divider {
        display: none;
    }

    .stat-item {
        flex: 1 1 40%;
    }

    .steps {
        flex-direction: column;
        align-items: center;
    }

    .step {
        max-width: 100%;
    }

    .step-arrow {
        transform: rotate(90deg);
        padding: 0;
        margin: 8px 0;
    }

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

    .model-row {
        padding: 20px;
    }

    .model-meta {
        gap: 12px;
    }

    .model-size {
        padding: 6px 12px;
        font-size: 13px;
    }

    .cta-card {
        padding: 40px 24px;
    }

    .cta-card h2 {
        font-size: 26px;
    }

    .footer {
        padding: 20px;
    }

    .footer-content {
        flex-direction: column;
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .terminal-body {
        font-size: 11px;
        padding: 16px;
    }

    .model-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        padding: 20px;
    }

    .model-meta {
        width: 100%;
        justify-content: space-between;
    }
}