/* AUTOSITE Design System – SaaS (General) */
/* Style: Flat Design | Typography: Terminal CLI Monospace */
/* Reasoning: HIGH | Anti-patterns: Excessive animation, Dark mode by default, Style not suited for: Complex 3D, premium/luxury, artistic portfolios, immersive experiences, high-detail */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,400;0,500;1,400&display=swap');

:root {
    /* Colors */
    --color-primary: #3B82F6;
    --color-on-primary: #FFFFFF;
    --color-secondary: #60A5FA;
    --color-on-secondary: #0F172A;
    --color-accent: #F59E0B;
    --color-on-accent: #0F172A;
    --color-background: #0F172A;
    --color-foreground: #F1F5F9;
    --color-card: #1E293B;
    --color-card-foreground: #F1F5F9;
    --color-muted: #1E293B;
    --color-muted-foreground: #94A3B8;
    --color-border: #334155;
    --color-destructive: #EF4444;

    /* Typography */
    --font-heading: 'JetBrains Mono', sans-serif;
    --font-body: 'JetBrains Mono', sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;

    /* Layout */
    --max-width: 1200px;
    --container-padding: 1.5rem;
}

/* ── Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
    font-family: var(--font-body);
    color: var(--color-foreground);
    background-color: var(--color-background);
    line-height: 1.7;
    font-size: 1rem;
}
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-foreground);
}
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-accent); }
img { max-width: 100%; height: auto; display: block; }

/* ── Container ── */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: all var(--transition-base);
    text-decoration: none;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); }
.btn-primary {
    background: var(--color-primary);
    color: var(--color-on-primary);
}
.btn-primary:hover { background: var(--color-secondary); color: var(--color-on-secondary); }
.btn-accent {
    background: var(--color-accent);
    color: var(--color-on-accent);
}
.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}
.btn-outline:hover { background: var(--color-primary); color: var(--color-on-primary); }

/* ── Cards ── */
.card {
    background: var(--color-card);
    color: var(--color-card-foreground);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }

/* ── Hero ── */
.hero {
    padding: var(--space-3xl) 0;
    text-align: center;
    background: linear-gradient(135deg, var(--color-background) 0%, var(--color-muted) 100%);
}
.hero h1 {
    margin-bottom: var(--space-lg);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}
.hero p {
    font-size: 1.25rem;
    color: var(--color-muted-foreground);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

/* ── Section ── */
.section {
    padding: var(--space-3xl) 0;
}
.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}
.section-header h2 { margin-bottom: var(--space-sm); }
.section-header p { color: var(--color-muted-foreground); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }

/* ── Grid ── */
.grid { display: grid; gap: var(--space-xl); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

/* ── Navigation ── */
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--container-padding);
    max-width: var(--max-width);
    margin: 0 auto;
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}
.navbar-brand {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--color-primary);
}
.navbar-links { display: flex; gap: var(--space-lg); list-style: none; }
.navbar-links a {
    color: var(--color-foreground);
    font-weight: 500;
    transition: color var(--transition-fast);
}
.navbar-links a:hover { color: var(--color-primary); }

/* ── Footer ── */
.footer {
    background: var(--color-foreground);
    color: var(--color-muted);
    padding: var(--space-3xl) 0 var(--space-xl);
}
.footer a { color: var(--color-muted); }
.footer a:hover { color: var(--color-on-primary); }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--space-2xl); }
.footer-bottom {
    margin-top: var(--space-2xl);
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
    color: var(--color-muted-foreground);
    font-size: 0.875rem;
}

/* ── Article ── */
.article {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-2xl) var(--container-padding);
}
.article h1 { margin-bottom: var(--space-lg); }
.article h2 { margin-top: var(--space-2xl); margin-bottom: var(--space-md); }
.article h3 { margin-top: var(--space-xl); margin-bottom: var(--space-sm); }
.article p { margin-bottom: var(--space-md); }
.article ul, .article ol { margin: var(--space-md) 0; padding-left: var(--space-xl); }
.article li { margin-bottom: var(--space-xs); }
.article img {
    border-radius: var(--radius-lg);
    margin: var(--space-xl) 0;
    box-shadow: var(--shadow-md);
}
.article blockquote {
    border-left: 4px solid var(--color-primary);
    padding: var(--space-md) var(--space-lg);
    margin: var(--space-xl) 0;
    background: var(--color-muted);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
}
.article table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-xl) 0;
}
.article th, .article td {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-border);
    text-align: left;
}
.article th {
    background: var(--color-muted);
    font-weight: 600;
}

/* ── FAQ ── */
.faq-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
    overflow: hidden;
}
.faq-question {
    padding: var(--space-md) var(--space-lg);
    font-weight: 600;
    cursor: pointer;
    background: var(--color-card);
}
.faq-answer {
    padding: 0 var(--space-lg) var(--space-md);
    color: var(--color-muted-foreground);
}

/* ── Badges / Tags ── */
.badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    background: var(--color-muted);
    color: var(--color-foreground);
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .navbar-links { display: none; /* hamburger menu needed */ }
    .hero { padding: var(--space-2xl) 0; }
    .grid-3 { grid-template-columns: 1fr; }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
    .grid-2 { grid-template-columns: 1fr; }
    .grid-4 { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
}

/* ── Prefers reduced motion ── */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}