:root {
    --bg: #f8f6f0;
    --text: #111;
    --border: #111;
    --gold: #b8953e;
    --hover: #edeadf;
    --muted: #777;
    --dim: #aaa;
    --code-bg: #f0ede4;
    --bw: 2px;
    --font: 'SF Mono', 'Fira Mono', 'Roboto Mono', 'Cascadia Mono', 'Consolas', 'Courier New', monospace;
}

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

html { scroll-behavior: smooth }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* ── NAV ── */

nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--bg);
    border-bottom: var(--bw) solid var(--border);
}

.nav-inner {
    max-width: 700px;
    margin: 0 auto;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.nav-logo {
    font-size: 15px;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
    letter-spacing: -0.3px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-logo-img {
    height: 80px;
    width: auto;
    margin: -28px -20px -28px -10px;
    object-fit: contain;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-links a {
    color: var(--muted);
    text-decoration: none;
    font-size: 12px;
    font-weight: 600;
    transition: color 0.15s;
}

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

.nav-links a.active-link {
    color: var(--gold);
}

.nav-back {
    color: var(--gold) !important;
}

/* ── LAYOUT ── */

main {
    max-width: 700px;
    margin: 0 auto;
    padding: 72px 24px 80px;
}

section {
    margin-bottom: 64px;
}

/* ── HERO ── */

.hero {
    text-align: center;
    padding: 52px 0 56px;
    border-bottom: var(--bw) solid var(--border);
    margin-bottom: 0;
}

.hero-logo {
    height: 80px;
    width: auto;
    margin-bottom: 16px;
}

.hero h1 {
    font-size: 40px;
    font-weight: 700;
    letter-spacing: -1.5px;
    line-height: 1.1;
}

.hero .tagline {
    color: var(--muted);
    font-size: 15px;
    margin-top: 14px;
    max-width: 380px;
    margin-inline: auto;
    line-height: 1.7;
}

.hero .sub {
    color: var(--dim);
    font-size: 13px;
    margin-top: 12px;
}

.badges {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-top: 24px;
    flex-wrap: wrap;
}

.badge {
    border: 1.5px solid var(--gold);
    color: var(--gold);
    padding: 4px 12px;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
}

/* ── SECTION BAR ── */

.section-bar {
    padding: 14px 24px;
    background: var(--gold);
    color: var(--bg);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    border-bottom: var(--bw) solid var(--border);
    margin-bottom: 48px;
    margin-left: -24px;
    margin-right: -24px;
}

/* ── HEADINGS ── */

h2 {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.3px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: var(--bw) solid var(--border);
}

h3 {
    font-size: 15px;
    font-weight: 700;
    margin: 24px 0 10px;
}

p {
    margin-bottom: 12px;
    color: var(--muted);
}

section > p:first-of-type {
    color: var(--text);
}

strong {
    color: var(--text);
    font-weight: 700;
}

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

a:hover {
    text-decoration: underline;
}

/* ── FLOW DIAGRAM ── */

.flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin: 28px 0;
    flex-wrap: wrap;
}

.flow-node {
    border: var(--bw) solid var(--border);
    padding: 16px 24px;
    text-align: center;
    min-width: 120px;
}

.flow-node .label {
    font-size: 10px;
    color: var(--dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.flow-node .value {
    font-weight: 700;
    font-size: 15px;
}

.flow-arrow {
    color: var(--dim);
    font-size: 18px;
    flex-shrink: 0;
}

/* ── CARDS (BENTO GRID) ── */

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    background: var(--border);
    gap: var(--bw);
    border: var(--bw) solid var(--border);
    margin: 20px 0;
}

.card {
    background: var(--bg);
    padding: 24px;
    transition: background 0.15s;
}

.card:hover {
    background: var(--hover);
}

.card-icon {
    font-size: 22px;
    margin-bottom: 8px;
    display: block;
}

.card h4 {
    font-weight: 700;
    margin-bottom: 4px;
    font-size: 14px;
}

.card p {
    color: var(--muted);
    font-size: 13px;
    margin: 0;
    line-height: 1.5;
}

/* ── STEPS ── */

.steps {
    counter-reset: step;
}

.step {
    counter-increment: step;
    position: relative;
    padding-left: 48px;
    margin-bottom: 32px;
}

.step::before {
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 28px;
    height: 28px;
    border: var(--bw) solid var(--gold);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 12px;
    color: var(--gold);
}

.step h3 {
    margin-top: 0;
    margin-bottom: 8px;
}

/* ── CODE BLOCKS ── */

pre {
    background: var(--code-bg);
    border: var(--bw) solid var(--border);
    padding: 16px 20px;
    padding-right: 70px;
    overflow-x: auto;
    margin: 12px 0 18px;
    font-size: 13px;
    line-height: 1.8;
}

.pre-wrap {
    position: relative;
}

.pre-wrap pre {
    margin: 0;
}

.pre-wrap .copy-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 2;
}

code {
    font-family: var(--font);
    font-size: 13px;
}

p code, td code, li code {
    background: var(--code-bg);
    padding: 2px 6px;
    font-size: 12px;
}

.prompt {
    color: var(--dim);
    user-select: none;
}

.cmd {
    color: var(--text);
    font-weight: 700;
}

.flag {
    color: var(--gold);
}

.comment {
    color: var(--dim);
}

.copy-btn {
    background: var(--bg);
    border: 1.5px solid var(--border);
    color: var(--muted);
    padding: 4px 10px;
    font-size: 11px;
    cursor: pointer;
    font-family: var(--font);
    transition: all 0.15s;
}

.copy-btn:hover {
    background: var(--hover);
    color: var(--text);
}

.copy-btn.copied {
    color: #5a8a5a;
    border-color: #5a8a5a;
}

/* ── TERMINAL ── */

.terminal {
    border: var(--bw) solid var(--border);
    overflow: hidden;
    margin: 14px 0 20px;
}

.terminal-bar {
    background: #222;
    padding: 8px 14px;
    display: flex;
    align-items: center;
    gap: 6px;
    border-bottom: var(--bw) solid var(--border);
}

.terminal-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    opacity: 0.7;
}

.terminal-dot.r { background: #ff5f57 }
.terminal-dot.y { background: #febc2e }
.terminal-dot.g { background: #28c840 }

.terminal-title {
    color: #555;
    font-size: 11px;
    margin-left: 6px;
    font-family: var(--font);
}

.terminal pre {
    margin: 0;
    border: none;
    padding: 16px 20px;
    background: #111;
}

.terminal pre code {
    color: #888;
}

.terminal .highlight {
    color: var(--gold);
    font-weight: 700;
}

.terminal .ok {
    color: #5cb85c;
}

/* ── TABS ── */

.tab-bar {
    display: flex;
    gap: 0;
    border-bottom: var(--bw) solid var(--border);
}

.tab {
    padding: 10px 24px;
    font-size: 13px;
    font-weight: 700;
    color: var(--muted);
    cursor: pointer;
    border-bottom: var(--bw) solid transparent;
    margin-bottom: calc(var(--bw) * -1);
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
    font-family: var(--font);
    transition: color 0.15s;
}

.tab:hover {
    color: var(--text);
}

.tab.active {
    color: var(--gold);
    border-bottom-color: var(--gold);
}

.tab-panel {
    display: none;
    padding-top: 20px;
}

.tab-panel.active {
    display: block;
}

/* ── TABLE ── */

table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0 18px;
    font-size: 13px;
    border: var(--bw) solid var(--border);
}

th {
    text-align: left;
    padding: 10px 14px;
    background: var(--gold);
    color: var(--bg);
    font-weight: 700;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: var(--bw) solid var(--border);
}

td {
    padding: 10px 14px;
    border: var(--bw) solid var(--border);
    color: var(--muted);
}

/* ── CALLOUT ── */

.callout {
    border: var(--bw) solid var(--border);
    border-left: 4px solid var(--gold);
    padding: 16px 20px;
    margin: 16px 0;
    display: flex;
    gap: 10px;
    align-items: flex-start;
}

.callout-icon {
    font-size: 15px;
    flex-shrink: 0;
    margin-top: 1px;
}

.callout p {
    margin: 0;
    font-size: 13px;
    color: var(--muted);
}

/* ── FAQ ── */

.faq-item {
    border: var(--bw) solid var(--border);
    margin-bottom: calc(var(--bw) * -1);
    overflow: hidden;
}

.faq-q {
    padding: 14px 20px;
    cursor: pointer;
    font-weight: 700;
    font-size: 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
    transition: background 0.15s;
}

.faq-q:hover {
    background: var(--hover);
}

.faq-q .arrow {
    color: var(--dim);
    transition: transform 0.2s;
    font-size: 14px;
}

.faq-item.open .faq-q .arrow {
    transform: rotate(180deg);
}

.faq-a {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    color: var(--muted);
    font-size: 14px;
}

.faq-item.open .faq-a {
    max-height: 400px;
    padding: 4px 20px 18px;
}

.faq-a ul {
    margin: 6px 0 4px 18px;
}

.faq-a li {
    margin-bottom: 4px;
    font-size: 13px;
}

/* ── FOOTER ── */

footer {
    border-top: var(--bw) solid var(--border);
    max-width: 700px;
    margin: 0 auto;
    padding: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--dim);
}

footer a {
    color: var(--dim);
    text-decoration: none;
}

footer a:hover {
    color: var(--text);
    text-decoration: underline;
}

footer strong {
    color: var(--muted);
}

/* ── LISTS ── */

ul, ol {
    margin: 6px 0 14px 18px;
}

li {
    margin-bottom: 4px;
    color: var(--muted);
    font-size: 14px;
}

.li-text {
    color: var(--text);
}

/* ── RESPONSIVE ── */

@media (max-width: 540px) {
    .nav-inner {
        padding: 10px 16px;
    }

    .nav-logo {
        font-size: 13px;
    }

    .nav-logo-img {
        height: 48px;
        margin: -16px -8px -16px -4px;
    }

    .nav-links {
        gap: 10px;
    }

    .nav-links a {
        font-size: 11px;
    }

    .nav-back {
        display: none;
    }

    main {
        padding: 60px 16px 60px;
    }

    .hero {
        padding: 36px 0 40px;
    }

    .hero-logo {
        height: 60px;
    }

    .hero h1 {
        font-size: 28px;
        letter-spacing: -1px;
    }

    .hero .tagline {
        font-size: 14px;
    }

    .badges {
        gap: 6px;
    }

    .badge {
        font-size: 9px;
        padding: 3px 8px;
    }

    .section-bar {
        margin-left: -16px;
        margin-right: -16px;
        padding: 12px 16px;
    }

    .flow {
        flex-direction: column;
    }

    .flow-arrow {
        transform: rotate(90deg);
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .tab {
        padding: 8px 14px;
        font-size: 12px;
    }

    .step {
        padding-left: 40px;
    }

    pre {
        font-size: 11px;
        padding: 12px 14px;
    }

    .terminal pre {
        padding: 12px 14px;
    }

    table {
        font-size: 12px;
    }

    th, td {
        padding: 8px 10px;
    }

    footer {
        flex-direction: column;
        gap: 8px;
        text-align: center;
        padding: 20px 16px;
    }
}