:root {
  --accent: #2b7de9;
  --card: #ffffff;
  --text: #1d2939;
  --muted: #667085;
  --line: #e4e7ec;
  --danger: #d92d20;
  --ok: #067647;
}
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: linear-gradient(135deg, #e8f1ff, #fff6e5) fixed;
  background-size: cover;
}
.wrap { max-width: 1100px; margin: 0 auto; padding: 16px; }
.card { background: var(--card); border-radius: 14px; padding: 18px; box-shadow: 0 4px 16px rgba(16,24,40,.08); margin-bottom: 16px; }
h1 { font-size: 1.5rem; margin: 8px 0 12px; }
h2 { font-size: 1.15rem; margin: 0 0 10px; color: var(--accent); }
label { display: block; font-weight: 600; margin: 10px 0 4px; font-size: .95rem; }
input, select, textarea {
  width: 100%; padding: 10px 12px; font-size: 1rem; border: 1px solid var(--line);
  border-radius: 10px; background: #fff; font-family: inherit;
}
textarea { min-height: 220px; font-family: ui-monospace, Menlo, monospace; font-size: .9rem; }
button {
  background: var(--accent); color: #fff; border: 0; border-radius: 10px;
  padding: 10px 16px; font-size: 1rem; cursor: pointer; margin-top: 12px; margin-right: 6px;
}
button.secondary { background: #eef2f6; color: var(--text); }
button:disabled { opacity: .6; }
.tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.tabs button { margin: 0; background: #fff; color: var(--text); border: 1px solid var(--line); }
.tabs button.active { background: var(--accent); color: #fff; }
.msg { padding: 10px 12px; border-radius: 10px; margin: 10px 0; }
.msg.err { background: #fef3f2; color: var(--danger); }
.msg.ok { background: #ecfdf3; color: var(--ok); }
.msg.warn { background: #fffaeb; color: #b54708; }
.scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: .9rem; }
th, td { border: 1px solid var(--line); padding: 6px 8px; text-align: center; vertical-align: top; }
th { background: #f9fafb; }
.cell { font-weight: 600; color: var(--accent); }
.sub { color: var(--muted); font-size: .85rem; }
.top { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; }
.row { display: grid; grid-template-columns: 2fr 1fr auto auto auto; gap: 8px; align-items: center; margin-bottom: 8px; }
.row.quick { grid-template-columns: 1.5fr 1fr 1.5fr auto; }
.row select, .row input { margin: 0; }
.row button { margin: 0; }
.inline { display: flex; gap: 6px; align-items: center; font-weight: normal; margin: 0; white-space: nowrap; }
.inline input { width: auto; }
.card.inner { background: #f9fafb; box-shadow: none; border: 1px solid var(--line); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.chip { border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px; background: #fff; }
button[disabled] { cursor: wait; }
.row.subj { grid-template-columns: 2fr 1fr auto auto auto auto; }
.row.cls { grid-template-columns: 2fr 1fr 2fr auto; }
.sessions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
@media (max-width: 600px) {
  .wrap { padding: 12px; }
  .row, .row.quick, .row.subj, .row.cls { grid-template-columns: 1fr; }
}