:root {
    --bg-color: #0a0d10;
    --bg-raised: #10151a;
    --text-color: #b7c0c8;
    --text-dim: #7c8790;
    --heading-color: #f2f5f7;
    --nav-bg: rgba(10, 13, 16, 0.85);
    --border-color: #232b31;
    --border-soft: #1a2126;
    --box-bg: #10151a;
    --btn-bg: #eef2f4;
    --btn-text: #0a0d10;
    --btn-hover: #ffffff;
    --btn-disabled: #1c2328;
    --btn-disabled-text: #4c565e;
    --term-bg: #0c1013;
    --term-text: #d7dee2;
    --term-cursor: #6b7680;
    --highlight-bg: #171e23;
    --link-color: #7c8790;
    --link-hover: #f2f5f7;
    --accent: #3ddc84;
    --accent-dim: #2a9e5f;
    --accent-red: #e8604a;
    --accent-amber: #e8b347;
    --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, Menlo, monospace;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-display: 'Space Grotesk', 'Inter', sans-serif;
    --nav-height: 64px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --transition-fast: 0.16s ease;
    --transition-med: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body.light-mode {
    --bg-color: #f6f5f1;
    --bg-raised: #ffffff;
    --text-color: #3a4147;
    --text-dim: #6b7580;
    --heading-color: #0e1216;
    --nav-bg: rgba(246, 245, 241, 0.85);
    --border-color: #e0ded6;
    --border-soft: #eae8e1;
    --box-bg: #ffffff;
    --btn-bg: #0e1216;
    --btn-text: #f6f5f1;
    --btn-hover: #262c31;
    --btn-disabled: #e0ded6;
    --btn-disabled-text: #9b9b93;
    --term-bg: #ffffff;
    --term-text: #262c31;
    --term-cursor: #0e1216;
    --highlight-bg: #f1efe9;
    --link-color: #6b7580;
    --link-hover: #0e1216;
    --accent-dim: #1e8a52;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-sans);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 100vw;
    overflow-x: hidden;
    transition: background-color var(--transition-med), color var(--transition-med);
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    margin-top: var(--nav-height);
    padding: 32px 20px;
}

footer {
    width: 100%;
    text-align: center;
    padding: 22px;
    font-size: 12px;
    color: var(--text-dim);
    border-top: 1px solid var(--border-soft);
    margin-top: auto;
    background-color: var(--nav-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

footer a {
    color: var(--link-color);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition-fast);
}

footer a:hover {
    color: var(--link-hover);
}

::selection {
    background: var(--accent);
    color: #0a0d10;
}

*:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

@media (max-width: 600px) {
    main {
        padding: 24px 16px;
    }
}