:root {
    --bg: #15171C;
    --panel: #0f1724;
    --muted: #9aa4b2;
    --accent: #7cc4ff;
    --accent-hover: #98d6ff; /* added */
    --accent-active: #5ab4e8; /* added */
    --card: #111827;
    --nav: #0d1220;
    --border: rgba(255,255,255,0.06);
    --content-bg: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
}

html, body {
    height: 100%;
    margin: 0;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
    background: var(--bg);
    color: #e6eef6;
}

.app {
    display: flex;
    min-height: 100vh;
    flex-direction: column;
}

header.site-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    background: linear-gradient(90deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 40;
    backdrop-filter: blur(6px);
}

.brand {
    display: flex;
    align-items: center;
    gap: .75rem;
    text-decoration: none;
    color: inherit;
}

.logo {
    width: 36px;
    height: 36px;
    display: inline-grid;
    place-items: center;
    background: linear-gradient(135deg,var(--accent),#5ed0b3);
    color: #071022;
    font-weight: 700;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.title {
    font-size: 1.05rem;
    font-weight: 600;
}

.subtitle {
    font-size: .82rem;
    color: var(--muted);
    margin-left: 4px;
}

.top-actions {
    margin-left: auto;
    display: flex;
    gap: .5rem;
    align-items: center;
}

.btn {
    background: transparent;
    color: var(--accent);
    border: 1px solid transparent;
    padding: .35rem .6rem;
    border-radius: 6px;
    font-size: .85rem;
    text-decoration: none;
}

    .btn.ghost {
        color: var(--muted);
        border: 1px solid rgba(255,255,255,0.03);
    }

.container {
    display: flex;
    flex: 1;
    gap: 1rem;
    padding: 1rem;
}

nav.sidebar {
    width: 260px;
    background: var(--bg); /* Changed from var(--nav) */
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: .75rem;
    height: calc(100vh - 96px);
    overflow: auto;
    box-shadow: 0 4px 30px rgba(2,6,23,0.6);
}

    nav.sidebar ul {
        list-style: none;
        margin: 0;
        padding: 0;
        display: flex;
        flex-direction: column;
        gap: .25rem;
    }

    nav.sidebar a {
        display: block;
        padding: .5rem .6rem;
        color: var(--muted);
        text-decoration: none;
        border-radius: 6px;
        font-weight: 500;
    }

        nav.sidebar a.active, nav.sidebar a:hover {
            background: linear-gradient(90deg, rgba(124,196,255,0.08), rgba(94,208,179,0.03));
            color: var(--accent);
            box-shadow: inset 0 0 0 1px rgba(124,196,255,0.02);
        }

main.content {
    flex: 1;
    background: var(--bg); /* Changed from var(--panel) */
    border-radius: 8px;
    padding: 0.25rem;
    border: 1px solid var(--border);
    box-shadow: 0 6px 30px rgba(2,6,23,0.6);
    height: calc(100vh - 96px);
    overflow: auto;
}

/* markdown content */

pre, code {
    background: rgba(0,0,0,0.35);
    color: #e6eef6;
    padding: .45rem .6rem;
    border-radius: 6px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, "Roboto Mono", "Segoe UI Mono", monospace;
    font-size: .9rem;
}

pre {
    overflow: auto;
    padding: .8rem;
}

.muted {
    color: var(--muted);
    font-size: .9rem;
}

footer.site-footer {
    padding: .6rem 1rem;
    color: var(--muted);
    border-top: 1px solid var(--border);
    font-size: .85rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    background: linear-gradient(180deg, rgba(255,255,255,0.01), rgba(255,255,255,0.02));
}

/* --- Link visibility & accessibility on dark backgrounds --- */

a {
    color: var(--accent);
    text-decoration: none;
    transition: color .15s ease, box-shadow .15s ease;
}

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

a:active {
    color: var(--accent-active);
}

a:visited {
    color: var(--accent);
    opacity: 0.95;
}

a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 3px;
    text-decoration: underline;
}

.muted a { /* links inside muted blocks */
    color: var(--accent);
    text-decoration: underline;
}

.markdown-body a {
    color: var(--accent);
    font-weight: 500;
}

.markdown-body a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.markdown-body code a,
code a {
    color: var(--accent);
    text-decoration: underline;
}

.markdown-body td a,
.markdown-body li a {
    color: var(--accent);
}

@supports (text-decoration-skip-ink: auto) {
    a { text-decoration-skip-ink: auto; }
}