:root {
  --plum: #3C0A33; --plum-2: #551248; --deep: #C01BA2; --deep-2: #a3168a; --magenta: #FF00FF; --pink: #F7AAF3;
  --white: #FFFFFF; --ink: #2a0724; --muted: #7a5a72; --line: #ecd9e8; --soft: #fdf3fc; --bg: #faf6f9; --bad: #b3261e; --ok: #2e7d4f;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}
* { box-sizing: border-box; }
html, body { margin: 0; font: 15px/1.5 var(--font); color: var(--ink); background: var(--bg); }
a { color: var(--deep); }
h1, h2, h3 { line-height: 1.2; color: var(--plum); }
h1 { font-size: 26px; margin: 0 0 6px; }
h2 { font-size: 19px; margin: 28px 0 10px; }
h3 { font-size: 16px; margin: 0; }
.brand { font-weight: 800; font-size: 20px; letter-spacing: .02em; color: var(--white); }
.brand i { font-style: normal; color: var(--pink); }
.brand span { font-weight: 500; font-size: 13px; color: var(--pink); margin-left: 6px; letter-spacing: .08em; text-transform: uppercase; }

button { font: inherit; font-size: 14px; cursor: pointer; border-radius: 999px; border: 1.5px solid var(--deep); padding: 6px 16px;
  background: var(--white); color: var(--deep); font-weight: 600; }
button:hover { background: var(--soft); }
button.primary { background: var(--deep); color: var(--white); }
button.primary:hover { background: var(--deep-2); border-color: var(--deep-2); }
button.danger { border-color: var(--bad); color: var(--bad); }
button.armed { background: var(--bad); color: var(--white); border-color: var(--bad); }
button.link { border: 0; background: none; padding: 0; color: var(--deep); font-weight: 500; text-decoration: underline; border-radius: 0; }
button.small { font-size: 13px; padding: 3px 12px; }
button:disabled { opacity: .45; cursor: default; }
:focus-visible { outline: 3px solid var(--magenta); outline-offset: 2px; }
input, select, textarea { font: inherit; font-weight: 400; color: var(--ink); background: var(--white); border: 1.5px solid var(--line); border-radius: 8px; padding: 7px 10px; }
input:focus, select:focus, textarea:focus { border-color: var(--deep); outline: none; }
textarea { width: 100%; min-height: 90px; font-family: var(--mono); font-size: 13px; }
label.f { display: grid; gap: 4px; font-size: 13px; color: var(--muted); font-weight: 600; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.grow { flex: 1; min-width: 200px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.err { color: var(--bad); }
.ok { color: var(--ok); }
.mono { font-family: var(--mono); }

/* layout */
.top { background: var(--plum); padding: 0 24px; display: flex; align-items: center; gap: 28px; min-height: 58px; flex-wrap: wrap; }
.top nav { display: flex; gap: 4px; flex: 1; }
.top nav a { white-space: nowrap; color: var(--white); text-decoration: none; padding: 6px 12px; border-radius: 999px; font-weight: 500; }
.top nav a.on { background: var(--plum-2); box-shadow: inset 0 0 0 1.5px var(--pink); }
.top form button { background: none; color: var(--pink); border-color: var(--pink); }
main { max-width: 980px; margin: 0 auto; padding: 28px 24px 120px; }
.lede { color: var(--muted); margin: 0 0 20px; max-width: 720px; }
.panel { background: var(--white); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; margin: 14px 0; }

/* courses */
.course-card { display: grid; grid-template-columns: 1fr auto; gap: 6px 16px; align-items: center; cursor: pointer; }
.course-card:hover { border-color: var(--pink); }
.code { font: 700 16px var(--mono); letter-spacing: .1em; background: var(--soft); color: var(--plum); padding: 3px 10px; border-radius: 6px; }
.badge { font-size: 12px; font-weight: 700; padding: 1px 9px; border-radius: 999px; background: var(--soft); color: var(--muted); }
.badge.block { background: var(--plum); color: var(--pink); }
.badge.allow { background: var(--deep); color: var(--white); }

/* lock editor */
.lock { border-left: 4px solid var(--deep); }
.lock.block { border-left-color: var(--plum); }
.lock-head { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 12px; }
.lock-head input.name { font-weight: 700; font-size: 16px; flex: 1; min-width: 200px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.lists { display: flex; flex-wrap: wrap; gap: 6px 14px; }
.lists label { display: flex; gap: 6px; align-items: center; font-size: 14px; }
.window { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; padding: 6px 0; }
.days { display: flex; gap: 4px; }
.days button { width: 40px; padding: 4px 0; border-radius: 6px; font-size: 13px; border-color: var(--line); color: var(--muted); font-weight: 600; }
.days button[aria-pressed="true"] { background: var(--plum); color: var(--white); border-color: var(--plum); }
.savebar { position: fixed; left: 0; right: 0; bottom: 0; background: var(--white); border-top: 1px solid var(--line); padding: 12px 24px;
  display: flex; justify-content: center; gap: 14px; align-items: center; box-shadow: 0 -6px 18px rgba(60, 10, 51, .06); z-index: 5; }
.savebar .inner { max-width: 932px; width: 100%; display: flex; gap: 14px; align-items: center; }

/* week grid */
.week { display: grid; grid-template-columns: 44px repeat(7, 1fr); gap: 0 4px; font-size: 12px; }
.week .dayname { text-align: center; font-weight: 700; color: var(--plum); padding-bottom: 4px; }
.week .hours { position: relative; height: 288px; }
.week .hours span { position: absolute; right: 6px; transform: translateY(-50%); color: var(--muted); }
.week .col { position: relative; height: 288px; background: repeating-linear-gradient(to bottom, var(--soft) 0 1px, transparent 1px 36px); border-radius: 6px; border: 1px solid var(--line); }
.week .slot { position: absolute; left: 2px; right: 2px; border-radius: 4px; padding: 1px 4px; overflow: hidden; color: var(--white); font-size: 11px; line-height: 1.25; }
.legend { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 10px; font-size: 13px; }
.legend i { display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin-right: 6px; vertical-align: -1px; }

#toast { position: fixed; bottom: 80px; left: 50%; transform: translateX(-50%); background: var(--plum); color: var(--white);
  padding: 9px 16px; border-radius: 999px; z-index: 20; max-width: 90vw; }
#toast.bad { background: var(--bad); }

/* login */
body.login { min-height: 100vh; display: grid; place-items: center; background: var(--plum); padding: 16px; }
.login-card { background: var(--plum-2); padding: 28px; border-radius: 16px; display: grid; gap: 14px; width: min(360px, 100%); }
.login-card label { color: var(--pink); display: grid; gap: 6px; font-weight: 600; font-size: 14px; }
.login-card .err { color: #ffb4c8; margin: 0; }

@media (max-width: 720px) {
  .grid2 { grid-template-columns: 1fr; }
  main { padding: 20px 16px 120px; }
  .top { padding: 8px 16px; gap: 6px 10px; }
  .top nav { order: 3; flex-basis: 100%; }
  .top nav a { padding: 4px 10px; }
  .top form { margin-left: auto; }
  .week { font-size: 10px; grid-template-columns: 32px repeat(7, 1fr); }
}