:root {
    --bg: #0a0a0a;
    --surface: #1a1a1a;
    --border: rgba(255, 255, 255, 0.07);
    --border-strong: rgba(255, 255, 255, 0.14);
    --accent: #c8f06e;
    --accent2: #a8d44a;
    --accent-dim: rgba(200, 240, 110, 0.1);
    --text: #f0f0ec;
    --text2: #999990;
    --text3: #555550;
    --mono: 'JetBrains Mono', 'Courier New', monospace;
    --serif: 'Playfair Display', Georgia, serif;
    --sans: 'Syne', 'Segoe UI', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

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

::selection {
    background: var(--accent);
    color: #0a0a0a;
}

::-webkit-scrollbar {
    width: 3px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: var(--accent2);
    border-radius: 2px;
}

/* Noise overlay */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 999;
}

/* ─── NAV ─── */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 3rem;
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border);
    transition: padding .4s;
}

nav.scrolled {
    padding: 1rem 3rem;
}

.nav-logo {
    font-family: var(--mono);
    font-size: .8rem;
    font-weight: 400;
    color: var(--accent);
    text-decoration: none;
    letter-spacing: .12em;
    text-transform: uppercase;
}

.back-link {
    font-family: var(--mono);
    font-size: .7rem;
    color: var(--text2);
    text-decoration: none;
    letter-spacing: .08em;
    transition: color .3s;
}

.back-link:hover {
    color: var(--accent);
}

/* ─── ARTICLE ─── */
.post {
    max-width: 780px;
    margin: 0 auto;
    padding: 8rem 2rem 4rem;
}

.post-header {
    margin-bottom: 4rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--border);
}

.post-meta {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.post-tag {
    font-family: var(--mono);
    font-size: .62rem;
    color: var(--accent);
    letter-spacing: .14em;
    text-transform: uppercase;
    padding: .3rem .7rem;
    border: 1px solid rgba(200, 240, 110, .25);
    border-radius: 2px;
    background: var(--accent-dim);
}

.post-date,
.post-read-time {
    font-family: var(--mono);
    font-size: .62rem;
    color: var(--text3);
    letter-spacing: .08em;
}

.post-title {
    font-family: var(--serif);
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 500;
    line-height: 1.15;
    letter-spacing: -.02em;
    margin-bottom: 1.5rem;
}

.post-title em {
    font-style: italic;
    color: var(--accent);
}

.post-subtitle {
    font-size: 1rem;
    color: var(--text2);
    line-height: 1.8;
    max-width: 620px;
}

/* ─── POST BODY ─── */
.post-body {
    font-size: .95rem;
    line-height: 1.9;
    color: var(--text2);
}

.post-body h2 {
    font-family: var(--serif);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text);
    margin-top: 3.5rem;
    margin-bottom: 1.2rem;
    letter-spacing: -.01em;
}

.post-body h3 {
    font-family: var(--sans);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text);
    margin-top: 2.5rem;
    margin-bottom: .8rem;
}

.post-body p {
    margin-bottom: 1.3rem;
}

.post-body strong {
    color: var(--text);
    font-weight: 600;
}

.post-body em {
    font-style: italic;
    color: var(--text);
}

.post-body ul {
    margin: 1rem 0 1.5rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: .5rem;
}

.post-body li {
    line-height: 1.8;
}

.post-body li strong {
    color: var(--accent);
}

.post-callout {
    margin: 2rem 0;
    padding: 1.5rem 1.8rem;
    border-left: 2px solid var(--accent);
    background: var(--accent-dim);
    border-radius: 0 4px 4px 0;
    font-size: .9rem;
    line-height: 1.8;
    color: var(--text);
}

.post-callout strong {
    color: var(--accent);
    font-weight: 600;
}

/* ─── POST FOOTER ─── */
.post-footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.post-nav {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.post-nav-link {
    font-family: var(--mono);
    font-size: .72rem;
    color: var(--text2);
    text-decoration: none;
    letter-spacing: .08em;
    padding: .7rem 1.2rem;
    border: 1px solid var(--border);
    border-radius: 3px;
    transition: all .3s;
}

.post-nav-link:hover {
    color: var(--accent);
    border-color: var(--accent);
    transform: translateY(-2px);
}

/* ─── MOBILE ─── */
@media (max-width: 900px) {
    nav {
        padding: 1rem 1.5rem;
    }

    nav.scrolled {
        padding: .8rem 1.5rem;
    }

    .post {
        padding: 6rem 1.5rem 3rem;
    }

    .post-title {
        font-size: 1.8rem;
    }
}