:root {
  --bg: #f6f5fb; --card: #fff; --ink: #1d1b2c; --muted: #6b6880;
  --accent: #6a4cff; --accent-ink: #fff; --line: #e4e1f0; --bad: #c62f4b; --ok: #1f8a5b;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #14121d; --card: #1e1b2b; --ink: #ecebf5; --muted: #a29fb8; --line: #2f2b42; }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; font: 15px/1.5 system-ui, "Segoe UI", sans-serif; background: var(--bg); color: var(--ink); }
main { max-width: 1000px; margin: 0 auto; padding: 20px 16px 60px; }
h1 { font-size: 1.5rem; margin: .2em 0 .8em; }
h2 { font-size: 1.1rem; margin: 1.6em 0 .6em; }
a { color: var(--accent); }

nav.top { display: flex; flex-wrap: wrap; gap: 4px 16px; align-items: center; padding: 12px 16px;
  background: var(--card); border-bottom: 1px solid var(--line); }
nav.top a { text-decoration: none; color: var(--ink); }
nav.top .brand { font-weight: 700; color: var(--accent); margin-right: 8px; }
nav.top .logout { margin-left: auto; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; margin-bottom: 16px; }
.flash { background: var(--accent); color: var(--accent-ink); padding: 10px 14px; border-radius: 10px; }
.muted { color: var(--muted); }
.bad { color: var(--bad); }
.ok { color: var(--ok); }

label { display: block; font-weight: 600; margin: 10px 0 4px; }
input[type=text], input[type=password], input[type=number], input[type=time], select, textarea {
  width: 100%; max-width: 420px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg); color: var(--ink); font: inherit; }
button, .btn { display: inline-block; padding: 8px 14px; border: 0; border-radius: 8px; cursor: pointer;
  background: var(--accent); color: var(--accent-ink); font: inherit; text-decoration: none; }
button.secondary { background: var(--line); color: var(--ink); }
button.danger { background: var(--bad); }
button.link { background: none; color: var(--accent); padding: 0; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.inline { display: inline; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { font-size: .85rem; color: var(--muted); font-weight: 600; }
td.thumb img { width: 112px; aspect-ratio: 16/9; object-fit: cover; border-radius: 6px; display: block; background: var(--line); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
a.small { font-size: .8rem; display: inline-block; margin-top: 2px; }
.code { font: 700 2.4rem/1 ui-monospace, monospace; letter-spacing: .2em; }

@media (max-width: 640px) {
  td.thumb img { width: 72px; }
  .hide-sm { display: none; }
}