:root {
    --bg-primary: #0a0c10;
    --bg-surface: rgba(18, 22, 31, 0.75);
    --bg-card: rgba(25, 31, 45, 0.65);
    --border-color: rgba(255, 255, 255, 0.1);
    --border-accent: rgba(99, 102, 241, 0.4);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --accent-blue: #6366f1;
    --accent-cyan: #06b6d4;
    --accent-emerald: #10b981;
    --accent-red: #ef4444;
    
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'Fira Code', monospace;
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* Glass Background Glows */
.glass-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: 
        radial-gradient(circle at 15% 20%, rgba(99, 102, 241, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 85% 70%, rgba(6, 182, 212, 0.12) 0%, transparent 40%);
    pointer-events: none;
    z-index: -1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
.header {
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(12px);
    background: rgba(10, 12, 16, 0.8);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-text h1 {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.badge {
    font-size: 0.65rem;
    padding: 2px 6px;
    background: rgba(99, 102, 241, 0.2);
    border: 1px solid var(--accent-blue);
    border-radius: 4px;
    color: #a5b4fc;
}

.nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

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

.nav-btn {
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--accent-blue), #4f46e5);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    transition: opacity 0.2s;
}

.nav-btn:hover {
    opacity: 0.9;
}

/* Hero */
.hero {
    padding: 4rem 0 3rem;
    text-align: center;
}

.hero-pill {
    display: inline-block;
    padding: 0.35rem 1rem;
    background: rgba(6, 182, 212, 0.15);
    border: 1px solid var(--accent-cyan);
    border-radius: 20px;
    color: #67e8f9;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.hero h2 {
    font-size: 2.75rem;
    font-weight: 800;
    line-height: 1.2;
    background: linear-gradient(135deg, #ffffff 40%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
}

.hero p {
    max-width: 750px;
    margin: 0 auto 2.5rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.stat-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.25rem 2.5rem;
    backdrop-filter: blur(10px);
}

.stat-value {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent-cyan);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Sections & Cards */
.section {
    margin-bottom: 4rem;
}

.section-header {
    margin-bottom: 1.5rem;
}

.section-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    backdrop-filter: blur(16px);
}

.border-accent {
    border-color: var(--border-accent);
}

/* Studio Grid */
.studio-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 2rem;
}

@media (max-width: 900px) {
    .studio-grid {
        grid-template-columns: 1fr;
    }
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(10, 12, 16, 0.7);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.2s;
}

.form-control:focus {
    border-color: var(--accent-blue);
}

.btn {
    display: inline-block;
    width: 100%;
    padding: 0.85rem;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), #4f46e5);
    color: white;
}

.btn-primary:hover {
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

.presets {
    margin-top: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}

.preset-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    width: 100%;
}

.btn-preset {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.35rem 0.65rem;
    border-radius: 6px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-preset:hover {
    background: rgba(99, 102, 241, 0.15);
    color: var(--text-primary);
    border-color: var(--accent-blue);
}

/* Code Blocks */
.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.response-time {
    color: var(--accent-emerald);
    font-family: var(--font-mono);
}

.code-block {
    background: rgba(10, 12, 16, 0.9);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.25rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: #e5e7eb;
    overflow-x: auto;
    white-space: pre-wrap;
}

.code-block.compact {
    max-height: 250px;
}

.acfp-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 800px) {
    .acfp-grid {
        grid-template-columns: 1fr;
    }
}

.card-title {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.text-red { color: var(--accent-red); }
.text-green { color: var(--accent-emerald); }

/* Footer */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}