/* Tetherand site palette — matches the Compose Theme.kt accents. */
:root {
    --bg:         #181c26;
    --bg-elev:   #20242e;
    --bg-card:   #262b37;
    --border:    #353a47;
    --fg:        #e7ebf0;
    --fg-dim:    #9ca3b0;
    --fg-faint:  #6b7180;
    --accent:    #00d68f;
    --warn:      #ffc857;
    --danger:    #ff5d62;
    --info:      #b388ff;
    --mono:      ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono", "Source Code Pro", Menlo, Consolas, monospace;
    --sans:      -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --radius:    8px;
    --radius-lg: 14px;
    --sidebar-w: 260px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: var(--sans);
    font-size: 15px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; transition: color 0.15s; }
a:hover { color: #4cf2b6; text-decoration: underline; }

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    letter-spacing: -0.01em;
    margin: 1.8em 0 0.6em 0;
    line-height: 1.25;
}
h1 { font-size: 2rem; margin-top: 0.4em; }
h2 {
    font-size: 1.45rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.3em;
}
h3 { font-size: 1.15rem; color: var(--fg); }
h4 { font-size: 1rem;    color: var(--fg-dim); font-weight: 600; }

p { margin: 0.6em 0 1em 0; }
strong { color: var(--fg); font-weight: 600; }
hr { border: 0; border-top: 1px solid var(--border); margin: 2em 0; }

code, pre {
    font-family: var(--mono);
    font-size: 13px;
}
code {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1px 5px;
    font-size: 12.5px;
    color: var(--accent);
}
pre {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 16px;
    overflow-x: auto;
    margin: 1em 0;
    line-height: 1.5;
}
pre code {
    background: transparent;
    border: 0;
    padding: 0;
    color: var(--fg);
    font-size: 13px;
}

/* ============ Layout ============ */
.shell {
    display: grid;
    grid-template-columns: var(--sidebar-w) 1fr;
    min-height: 100vh;
}
@media (max-width: 860px) {
    .shell { grid-template-columns: 1fr; }
    .sidebar { display: none; }
}
.sidebar {
    background: var(--bg-elev);
    border-right: 1px solid var(--border);
    padding: 24px 18px 40px 24px;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}
.sidebar .brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 28px;
    text-decoration: none;
    color: var(--fg);
}
.sidebar .brand img {
    width: 36px; height: 36px;
    border-radius: 8px;
}
.sidebar .brand h1 {
    font-size: 1.1rem;
    margin: 0;
    letter-spacing: -0.02em;
}
.sidebar .brand small {
    display: block;
    color: var(--fg-faint);
    font-size: 11px;
    margin-top: 2px;
}
.sidebar nav h5 {
    color: var(--fg-faint);
    font-size: 10.5px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 600;
    margin: 22px 0 8px 0;
}
.sidebar nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.sidebar nav li {
    margin: 1px 0;
}
.sidebar nav a {
    display: block;
    color: var(--fg-dim);
    padding: 5px 8px;
    border-radius: 5px;
    font-size: 13.5px;
    text-decoration: none;
    transition: background 0.1s, color 0.1s;
}
.sidebar nav a:hover {
    color: var(--fg);
    background: var(--bg-card);
}
.sidebar nav a.current {
    color: var(--accent);
    background: var(--bg-card);
    border-left: 2px solid var(--accent);
    padding-left: 6px;
}

main {
    padding: 40px clamp(20px, 4vw, 64px) 80px;
    max-width: 920px;
}

/* ============ Hero (index page) ============ */
.hero {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 36px;
    align-items: center;
    padding: 40px 0 36px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 36px;
}
@media (max-width: 660px) {
    .hero { grid-template-columns: 1fr; gap: 18px; }
}
.hero img {
    width: 168px;
    height: 168px;
    border-radius: 24px;
    box-shadow: 0 14px 40px rgba(0, 214, 143, 0.18);
}
.hero h1 {
    font-size: 2.6rem;
    margin: 0 0 8px 0;
    letter-spacing: -0.025em;
}
.hero p.tagline {
    color: var(--fg-dim);
    font-size: 1.15rem;
    margin: 0 0 18px 0;
    line-height: 1.45;
}
.hero .cta {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.hero .cta a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid var(--border);
    transition: all 0.15s;
}
.hero .cta a.primary {
    background: var(--accent);
    color: #051d12;
    border-color: var(--accent);
}
.hero .cta a.primary:hover { background: #4cf2b6; }
.hero .cta a.secondary {
    background: transparent;
    color: var(--fg);
}
.hero .cta a.secondary:hover { background: var(--bg-card); }

/* ============ Cards ============ */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin: 24px 0;
}
.card {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
}
.card h3 {
    margin: 0 0 8px 0;
    font-size: 1.05rem;
    color: var(--accent);
}
.card p {
    margin: 0;
    font-size: 14px;
    color: var(--fg-dim);
    line-height: 1.5;
}

/* ============ Tables ============ */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.2em 0;
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}
table th, table td {
    text-align: left;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
    vertical-align: top;
}
table th {
    background: var(--bg-card);
    color: var(--fg);
    font-size: 12.5px;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}
table tr:last-child td { border-bottom: 0; }
table td code {
    font-size: 11.5px;
    padding: 1px 4px;
}

/* ============ Callouts ============ */
.callout {
    border-left: 3px solid var(--info);
    background: var(--bg-elev);
    padding: 12px 16px;
    border-radius: 0 var(--radius) var(--radius) 0;
    margin: 18px 0;
}
.callout.warn   { border-left-color: var(--warn);   }
.callout.danger { border-left-color: var(--danger); }
.callout.ok     { border-left-color: var(--accent); }
.callout strong { color: var(--fg); }

/* ============ Badges ============ */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-family: var(--mono);
}
.badge.ok     { background: rgba(0, 214, 143, 0.15); color: var(--accent); }
.badge.warn   { background: rgba(255, 200, 87, 0.15); color: var(--warn); }
.badge.danger { background: rgba(255, 93, 98, 0.15); color: var(--danger); }
.badge.info   { background: rgba(179, 136, 255, 0.15); color: var(--info); }
.badge.neutral { background: var(--bg-card); color: var(--fg-dim); }

/* ============ Lists ============ */
ul, ol { padding-left: 1.3em; }
li { margin: 0.3em 0; }
ul.checklist { list-style: none; padding-left: 0; }
ul.checklist li {
    padding-left: 22px;
    position: relative;
    margin: 0.5em 0;
}
ul.checklist li::before {
    content: "●";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-family: var(--mono);
}

/* ============ Footer ============ */
.site-footer {
    margin-top: 60px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    color: var(--fg-faint);
    font-size: 12.5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}
.site-footer a { color: var(--fg-dim); }
.site-footer a:hover { color: var(--accent); }

/* ============ Mobile top-bar (when sidebar collapses) ============ */
.mobile-bar {
    display: none;
    background: var(--bg-elev);
    border-bottom: 1px solid var(--border);
    padding: 12px 16px;
    align-items: center;
    gap: 10px;
}
.mobile-bar img { width: 28px; height: 28px; border-radius: 6px; }
.mobile-bar h1 { margin: 0; font-size: 1rem; }
@media (max-width: 860px) {
    .mobile-bar { display: flex; }
}

.toc-bottom {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 18px 22px;
    margin-top: 40px;
}
.toc-bottom h4 {
    margin: 0 0 8px 0;
    font-size: 11px;
    color: var(--fg-faint);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}
.toc-bottom .links {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
}
.toc-bottom .links a { font-size: 13.5px; }