/* Theme CSS Variables */
:root {
    /* Core theme tokens - Dark (default) */
    --bg: #0A0A0A;
    --bg-elev: #111318;
    --text: #F3F4F6;
    --muted: #9CA3AF;
    --border: #1F2937;
    --chip-bg: #111827;
    --chip-text: #E5E7EB;
    --link: #93C5FD;

    /* Accent colors (theme-independent) */
    --primary-color: #00d4ff;
    --secondary-color: #00a6cc;
    --accent-color: #40e0d0;
    --success: #10b981;

    /* Typography */
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', 'Inter', sans-serif;

    /* Layout */
    --max-width: 1200px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light theme overrides */
[data-theme="light"] {
    --bg: #FAFAFA;
    --bg-elev: #FFFFFF;
    --text: #0A0A0A;
    --muted: #4B5563;
    --border: #E5E7EB;
    --chip-bg: #F3F4F6;
    --chip-text: #111827;
    --link: #1D4ED8;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

h1, h2, h3 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.75rem); }

p {
    margin-bottom: 1rem;
    color: var(--text);
}

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

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

/* Focus states for accessibility */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}