:root {
  --bg: #f6f7f9;
  --card: #fff;
  --text: #1d2330;
  --muted: #657084;
  --accent: #c8102e;
  --border: #dde1e8;
  --hit: #1a7f37;
  --miss: #b54708;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
}

* { box-sizing: border-box; }
body { margin: 0; }
main { max-width: 1100px; margin: 0 auto; padding: 1.5rem; }
h1 { margin-top: 0; }
a { color: var(--accent); }
.muted { color: var(--muted); }
.nowrap { white-space: nowrap; }

.topbar {
  display: flex; align-items: center; gap: 1.5rem;
  padding: .75rem 1.5rem; background: var(--text); color: #fff;
}
.topbar a { color: #fff; text-decoration: none; }
.topbar .brand { font-weight: 700; }
.topbar nav { display: flex; gap: 1rem; flex: 1; }
.topbar .who { color: #c3c9d4; }
.topbar form { margin: 0; }
.topbar button { background: none; border: 1px solid #fff6; color: #fff; padding: .25rem .6rem; }

.card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 1.25rem; margin-bottom: 1rem; }
.narrow { max-width: 380px; margin: 3rem auto; }

table.data { width: 100%; border-collapse: collapse; background: var(--card); }
table.data th, table.data td { text-align: left; padding: .45rem .6rem; border-bottom: 1px solid var(--border); }
table.data th { background: #eef0f4; }

label { display: block; margin: .6rem 0 .2rem; font-weight: 600; }
input[type=text], input[type=password], input[type=number], select {
  width: 100%; padding: .45rem .5rem; border: 1px solid var(--border); border-radius: 6px; font: inherit;
}
button, .button {
  display: inline-block; margin-top: .9rem; padding: .5rem 1rem; border: 0; border-radius: 6px;
  background: var(--accent); color: #fff; font: inherit; cursor: pointer; text-decoration: none;
}
button.secondary { background: #4a5468; }
.error { background: #fde8e8; border: 1px solid #f5b5b5; padding: .6rem .8rem; border-radius: 6px; }
.notice { background: #e8f1fd; border: 1px solid #b5cff5; padding: .6rem .8rem; border-radius: 6px; }

/* Planner */
.prefs { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; align-items: end; position: sticky; top: 0; z-index: 1; }
.prefs .submit { display: flex; align-items: center; gap: 1rem; justify-content: flex-end; }
.prefs .submit button { margin-top: 0; }
#picked.over { color: var(--accent); font-weight: 700; }
.depts { columns: 2 420px; column-gap: 1rem; }
.dept { break-inside: avoid; margin: 0 0 1rem; }
.dept legend { font-weight: 700; padding: 0 .3rem; }
label.course { display: flex; gap: .5rem; font-weight: normal; margin: .3rem 0; cursor: pointer; }

/* Results */
.banner {
  display: flex; flex-wrap: wrap; gap: 1.5rem; align-items: center;
  background: var(--card); border: 1px solid var(--border); border-left: 6px solid var(--accent);
  border-radius: 8px; padding: 1rem 1.25rem; margin-bottom: 1rem;
}
.banner .big { font-size: 1.6rem; margin-right: auto; }
.banner .stat { display: flex; flex-direction: column; font-size: 1.15rem; font-weight: 600; }
.banner .stat small { color: var(--muted); font-size: .75rem; font-weight: normal; }
.cache-hit { color: var(--hit); }
.cache-miss { color: var(--miss); }
.cache-off, .cache-unavailable { color: var(--muted); }
.schedules { display: grid; grid-template-columns: repeat(auto-fill, minmax(480px, 1fr)); gap: 1rem; }
.schedule h2 { font-size: 1.05rem; margin: 0 0 .6rem; }
.schedule h2 .muted { font-weight: normal; font-size: .85rem; }
.week { display: grid; grid-template-columns: repeat(5, 1fr); grid-template-rows: auto 260px; gap: 2px; margin-bottom: .6rem; }
.dayname { text-align: center; font-size: .8rem; color: var(--muted); }
.day { position: relative; background: #f0f2f5; border-radius: 4px; }
.block { position: absolute; left: 2px; right: 2px; border-radius: 3px; color: #fff; font-size: .68rem; padding: 1px 3px; overflow: hidden; line-height: 1.15; }
.swatch { display: inline-block; width: .7rem; height: .7rem; border-radius: 2px; margin-right: .35rem; }
table.compact td { padding: .25rem .4rem; font-size: .85rem; }
.c0 { background: #2563eb; } .c1 { background: #c8102e; } .c2 { background: #16a34a; }
.c3 { background: #9333ea; } .c4 { background: #d97706; }

/* Admin */
.admin-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1rem; }
.admin-grid h2 { margin-top: 0; font-size: 1.1rem; }
.toggle .state { font-size: 3rem; font-weight: 800; letter-spacing: .05em; }
.toggle.on .state { color: var(--hit); }
.toggle.off .state { color: var(--muted); }
.toggle form { display: inline-block; margin-right: .5rem; }
dl.stats { display: grid; grid-template-columns: auto 1fr; gap: .35rem 1rem; margin: 0; }
dl.stats dt { color: var(--muted); }
dl.stats dd { margin: 0; font-weight: 600; font-variant-numeric: tabular-nums; }