:root {
    --bg: #09090b;
    --bg-alt: #111113;
    --text: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #52525b;
    --accent: #6366f1;
    --accent-light: #818cf8;
    --border: #27272a;
    --ok: #34d399;
    --error: #f87171;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

/* --- Nav --- */
nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 0.75rem 2rem;
    background: rgba(9, 9, 11, 0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: 960px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.brand-logo,
.brand-wordmark {
    height: 56px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 400;
    transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.current { color: var(--text); }

/* --- Hamburger --- */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text);
    border-radius: 1px;
    transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* --- Footer --- */
footer {
    padding: 2rem;
    border-top: 1px solid var(--border);
}

.footer-bottom {
    max-width: 960px;
    margin: 0 auto;
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.footer-bottom a {
    color: var(--accent-light);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-bottom a:hover { color: var(--text); }

/* --- Responsive --- */
@media (max-width: 768px) {
    .nav-toggle { display: flex; }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background: rgba(9, 9, 11, 0.95);
        backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border);
        padding: 0.5rem 2rem 1rem;
    }

    .brand-logo,
    .brand-wordmark { height: 40px; }

    .nav-links.open { display: flex; }

    .nav-links li a {
        display: block;
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--border);
    }

    .nav-links li:last-child a { border-bottom: none; }
}