:root {
    color-scheme: dark;
    --bg: #0d0f14;
    --panel: #171a22;
    --panel-2: #202532;
    --text: #f5f7fb;
    --muted: #a8b0c2;
    --line: #2f3747;
    --accent: #7dd3fc;
    --danger: #fb7185;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: #07080c;
    border-bottom: 1px solid var(--line);
}
.brand { font-weight: 800; color: var(--text); }
.topbar nav { display: flex; gap: 1rem; }
.container { width: min(1200px, calc(100% - 2rem)); margin: 2rem auto; }
.narrow { max-width: 520px; }
.grid { display: grid; gap: 1rem; }
.grid.two { grid-template-columns: minmax(0, 2fr) minmax(320px, 1fr); }
.card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 1.25rem;
    box-shadow: 0 20px 60px rgba(0,0,0,.2);
}
h1, h2 { margin-top: 0; }
label { display: grid; gap: .35rem; margin-bottom: 1rem; color: var(--muted); }
label.inline { display: flex; align-items: center; gap: .5rem; }
input, button {
    border-radius: 10px;
    border: 1px solid var(--line);
    padding: .7rem .8rem;
    background: var(--panel-2);
    color: var(--text);
    font: inherit;
}
input.copy { width: 100%; }
button {
    cursor: pointer;
    background: var(--accent);
    color: #071018;
    border: 0;
    font-weight: 700;
}
button.danger { background: var(--danger); color: #19040a; }
.notice {
    padding: .8rem 1rem;
    border-radius: 12px;
    background: var(--panel-2);
    margin-bottom: 1rem;
}
.notice.error { border: 1px solid var(--danger); }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .75rem; border-bottom: 1px solid var(--line); vertical-align: top; }
td input { width: 100%; min-width: 360px; }
small, .muted { color: var(--muted); }
.video-list { display: grid; gap: .75rem; }
.video-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 1rem;
    align-items: start;
    padding: 1rem;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: #11141b;
}
.video-row small { display: block; margin-top: .35rem; word-break: break-all; }
details { min-width: 240px; }
summary { cursor: pointer; color: var(--accent); }
.compact-form { margin-top: 1rem; }
code { background: var(--panel-2); padding: .15rem .35rem; border-radius: 6px; }
@media (max-width: 800px) {
    .grid.two, .video-row { grid-template-columns: 1fr; }
    .topbar { align-items: flex-start; gap: .75rem; flex-direction: column; }
}