:root {
    --bg: #f5f4ef;
    --font-copy:
        "Aptos", "Ubuntu", "Fira Sans", "Trebuchet MS", "Segoe UI", sans-serif;
    --font-mono:
        "Ubuntu Mono", "Fira Mono", Consolas, "Cascadia Mono", Menlo, Monaco,
        "Droid Sans Mono", monospace;
    --panel: #ffffff;
    --ink: #171717;
    --muted: #555;
    --accent: #0b7a75;
    --accent-strong: #085f5b;
    --border: #d6d1c2;
    --shadow: 0 12px 30px rgba(8, 20, 22, 0.08);
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
}

body {
    margin: 0;
    padding: 0;
    min-height: 100vh; /* legacy fallback */
    min-height: 100svh; /* safe viewport: portrait-correct on Android */
}

body {
    background:
        radial-gradient(
            circle at 8% -12%,
            rgba(11, 122, 117, 0.25),
            transparent 38%
        ),
        radial-gradient(
            circle at 90% 0%,
            rgba(176, 120, 54, 0.17),
            transparent 33%
        ),
        var(--bg);
    color: var(--ink);
    font-family: var(--font-copy);
    line-height: 1.6;
}

.container {
    width: min(980px, 92vw);
    margin: 0 auto;
}

.site- r {
    padding: 1.1rem 0;
}

.brand {
    display: inline-block;
    text-decoration: none;
    color: var(--ink);
    font-weight: 700;
    letter-spacing: 0.02em;
}

.content {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: clamp(1.2rem, 2.5vw, 2.2rem);
    box-shadow: var(--shadow);
}

.hero {
    margin-bottom: 1.5rem;
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.8rem;
    color: var(--accent-strong);
    margin-bottom: 0.4rem;
    font-weight: 700;
}

h1,
h2,
h3 {
    font-family: var(--font-mono);
    line-height: 1.2;
    margin-top: 0;
}

h1 {
    font-size: clamp(1.9rem, 4vw, 2.9rem);
    margin-bottom: 0.8rem;
}

h2 {
    margin-top: 2rem;
    margin-bottom: 0.5rem;
}

.lead {
    font-size: 1.05rem;
    color: var(--muted);
    max-width: 65ch;
}

.cta-row {
    margin-top: 1.1rem;
}

.button {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    text-decoration: none;
    border-radius: 10px;
    padding: 0.64rem 1rem;
    font-weight: 600;
    transition:
        transform 140ms ease,
        background-color 140ms ease;
}

.button:hover,
.button:focus-visible {
    background: var(--accent-strong);
    transform: translateY(-1px);
}

ul {
    padding-left: 1.15rem;
}

pre {
    background: #102124;
    color: #eff7f5;
    border-radius: 10px;
    padding: 0.9rem;
    overflow: auto;
}

code {
    font-family: var(--font-mono);
}

.highlighter-rouge,
.highlight {
    margin: 1rem 0;
}

.highlighter-rouge .highlight {
    background: #102124;
    border: 1px solid rgba(239, 247, 245, 0.08);
    border-radius: 12px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.highlighter-rouge pre,
.highlight pre {
    margin: 0;
    background: transparent;
    color: #eff7f5;
}

.highlighter-rouge code,
.highlight code {
    color: inherit;
}

.highlight .c,
.highlight .cm,
.highlight .c1,
.highlight .cs {
    color: #7da0a0;
    font-style: italic;
}

.highlight .err {
    color: #fff3f1;
    background-color: #8a2f2f;
}

.highlight .k,
.highlight .kc,
.highlight .kd,
.highlight .kn,
.highlight .kp,
.highlight .kr,
.highlight .kt,
.highlight .nt,
.highlight .ow {
    color: #7fd6c2;
    font-weight: 700;
}

.highlight .o,
.highlight .cp,
.highlight .p {
    color: #d7e9e3;
}

.highlight .na,
.highlight .nf,
.highlight .fm {
    color: #f2c879;
}

.highlight .nb,
.highlight .bp,
.highlight .nc,
.highlight .nn {
    color: #8fd3ff;
}

.highlight .no,
.highlight .nv,
.highlight .vc,
.highlight .vg,
.highlight .vi {
    color: #f4d39a;
}

.highlight .s,
.highlight .sa,
.highlight .sb,
.highlight .sc,
.highlight .dl,
.highlight .sd,
.highlight .s2,
.highlight .se,
.highlight .sh,
.highlight .si,
.highlight .sx,
.highlight .sr,
.highlight .s1,
.highlight .ss {
    color: #c8ef9a;
}

.highlight .m,
.highlight .mb,
.highlight .mf,
.highlight .mh,
.highlight .mi,
.highlight .il,
.highlight .mo {
    color: #ffb86f;
}

.highlight .gh,
.highlight .gu {
    color: #ffffff;
    font-weight: 700;
}

.highlight .gd {
    color: #ffb0a8;
}

.highlight .gi {
    color: #a7e4a5;
}

.highlight .w {
    color: rgba(239, 247, 245, 0.18);
}

figure {
    margin: 0 30rem 0 0;
}

.diagram-card {
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1rem;
    background: linear-gradient(180deg, #fffdf8 0%, #faf7ef 100%);
}

.diagram-link {
    display: block;
}

.diagram-link img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 10px;
    background: #fcf8ee;
}

.diagram-card figcaption {
    margin-top: 0.7rem;
    color: var(--muted);
    font-size: 0.95rem;
}

.diagram-overlay {
    position: fixed;
    inset: 0;
    display: none;
    z-index: 999;
}

.diagram-overlay:target {
    display: block;
}

.diagram-overlay-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(245, 244, 239, 0.96);
}

.diagram-overlay-panel {
    position: relative;
    z-index: 1;
    width: 100vw;
    height: 100svh;
    margin: 0;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
    background: #f8f4e8;
    border: 1px solid #e1d8c1;
    border-radius: 18px;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.12);
}

.diagram-overlay-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.diagram-overlay-header h3 {
    margin: 0;
}

.diagram-overlay-close {
    color: var(--accent-strong);
    text-decoration: none;
    font-weight: 700;
}

.diagram-overlay-image-link {
    flex: 1;
    min-height: 0;
    overflow: auto;
    border-radius: 12px;
    background: #fffdf7;
    border: 1px solid #e5ddc8;
}

.diagram-overlay-image-link img {
    display: block;
    width: 100%;
    height: auto;
    min-width: 1200px;
}

[id*="gitsnitch"] + * > img {
    max-width: 100%;
    height: auto;
    display: block;
}

.site-footer {
    padding: 1rem 0 1.5rem;
    color: var(--muted);
    font-size: 0.94rem;
}

@media (max-width: 680px) {
    .content {
        border-radius: 12px;
    }

    .diagram-overlay-panel {
        width: 100vw;
        height: 100svh;
        margin: 0;
        border-radius: 0;
        padding: 0.85rem;
    }

    .diagram-overlay-header {
        align-items: flex-start;
        flex-direction: column;
    }
}