:root {
    --bg: #f4f5f7;
    --card: #ffffff;
    --text: #1d2330;
    --muted: #6b7280;
    --line: #e3e6eb;
    --accent: #2563eb;
    --accent-ink: #ffffff;
    --danger: #dc2626;
    --ok: #16a34a;
    --warn: #b45309;
    --radius: 12px;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0f1218;
        --card: #181c24;
        --text: #e6e8ec;
        --muted: #9aa1ad;
        --line: #2a303b;
        --accent: #3b82f6;
        --danger: #f87171;
        --ok: #4ade80;
        --warn: #fbbf24;
    }
}
* { box-sizing: border-box; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
    line-height: 1.6;
}
a { color: var(--accent); }
.topbar {
    display: flex; align-items: center; justify-content: space-between; gap: 16px;
    padding: 12px 20px; background: var(--card); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; text-decoration: none; color: var(--text); }
.topbar nav { display: flex; gap: 16px; flex-wrap: wrap; }
.topbar nav a { text-decoration: none; color: var(--muted); }
.topbar nav a:hover { color: var(--text); }
main { margin: 32px auto; padding: 0 16px; }
main.narrow { max-width: 560px; }
main.wide { max-width: 1100px; }
.card {
    background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
    padding: 24px; margin-bottom: 24px;
}
h1 { font-size: 1.4rem; margin: 0 0 16px; }
h2 { font-size: 1.1rem; margin: 0 0 12px; }
label { display: block; margin-bottom: 14px; font-size: .92rem; }
label .hint { color: var(--muted); font-size: .82rem; }
input[type=text], input[type=password], input[type=number], input[type=datetime-local], textarea {
    display: block; width: 100%; margin-top: 4px; padding: 10px 12px;
    border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--text);
    font: inherit;
}
textarea { min-height: 80px; resize: vertical; }
.check { display: flex; align-items: center; gap: 8px; }
.check input { width: auto; margin: 0; }
button, .btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    padding: 10px 18px; border: 0; border-radius: 8px; background: var(--accent); color: var(--accent-ink);
    font: inherit; font-weight: 600; cursor: pointer; text-decoration: none;
}
button:disabled { opacity: .5; cursor: default; }
.btn-sub { background: transparent; color: var(--text); border: 1px solid var(--line); }
.btn-danger { background: var(--danger); }
.btn-sm { padding: 5px 10px; font-size: .85rem; font-weight: 500; }
.btn-lg { padding: 14px 28px; font-size: 1.05rem; width: 100%; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1 1 200px; }
.alert { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; background: rgba(220,38,38,.1); color: var(--danger); }
.notice { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; background: rgba(22,163,74,.1); color: var(--ok); }
.muted { color: var(--muted); }
.small { font-size: .85rem; }

/* download page */
.dl-card { text-align: center; padding: 36px 28px; }
.dl-icon {
    width: 64px; height: 64px; margin: 0 auto 16px; border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    background: rgba(37,99,235,.12); color: var(--accent); font-weight: 700; font-size: .85rem;
}
.dl-title { font-size: 1.3rem; margin: 0 0 4px; word-break: break-all; }
.dl-meta { color: var(--muted); font-size: .9rem; margin-bottom: 20px; }
.dl-desc { text-align: left; white-space: pre-wrap; background: var(--bg); border-radius: 8px; padding: 12px 14px; margin-bottom: 20px; }
.dl-card form { text-align: left; }

/* admin */
.dropzone {
    border: 2px dashed var(--line); border-radius: var(--radius); padding: 28px; text-align: center;
    color: var(--muted); cursor: pointer; margin-bottom: 16px; transition: border-color .15s, background .15s;
}
.dropzone.over { border-color: var(--accent); background: rgba(37,99,235,.06); }
.queue { list-style: none; padding: 0; margin: 0 0 16px; }
.queue li { padding: 10px 0; border-bottom: 1px solid var(--line); }
.queue .name { display: flex; justify-content: space-between; gap: 12px; font-size: .9rem; word-break: break-all; }
.bar { height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; margin-top: 6px; }
.bar span { display: block; height: 100%; width: 0; background: var(--accent); transition: width .2s; }
.queue li.done .bar span { background: var(--ok); }
.queue li.error .bar span { background: var(--danger); }
.queue .result { font-size: .85rem; margin-top: 4px; word-break: break-all; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { color: var(--muted); font-weight: 500; white-space: nowrap; }
td.title { word-break: break-all; min-width: 200px; }
td.actions { white-space: nowrap; }
td.actions form { display: inline; }
.badge { display: inline-block; padding: 1px 8px; border-radius: 99px; font-size: .75rem; border: 1px solid var(--line); color: var(--muted); white-space: nowrap; }
.badge.lock { color: var(--warn); border-color: currentColor; }
.badge.off { color: var(--danger); border-color: currentColor; }
.badge.on { color: var(--ok); border-color: currentColor; }
.link-box { display: flex; gap: 6px; }
.link-box input { margin: 0; padding: 6px 8px; font-size: .82rem; }
.search { display: flex; gap: 8px; margin-bottom: 12px; }
.search input { margin: 0; }