:root {
  --bg: #f5f2eb;
  --card: #fffdf8;
  --ink: #17212b;
  --muted: #667085;
  --line: #ded7ca;
  --accent: #285c4d;
  --accent-2: #d97706;
  --soft: #e9efe9;
  --warn: #fff7ed;
  --danger: #b42318;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: radial-gradient(circle at top left, #fff9eb 0, var(--bg) 42%, #eef3ef 100%);
  color: var(--ink);
}
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 24px;
  align-items: end;
  padding: 34px clamp(16px, 4vw, 56px) 22px;
  border-bottom: 1px solid var(--line);
}
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(2rem, 5vw, 4.2rem); line-height: .95; margin-bottom: 12px; letter-spacing: -0.05em; }
h2 { font-size: clamp(1.3rem, 2.5vw, 2rem); margin-bottom: 0; letter-spacing: -0.03em; }
h3 { font-size: 1rem; margin-bottom: 10px; }
.subtitle { max-width: 760px; color: var(--muted); font-size: 1.05rem; }
.eyebrow { color: var(--accent-2); text-transform: uppercase; letter-spacing: .12em; font-size: .78rem; font-weight: 800; margin-bottom: 8px; }
.week-card, .panel {
  background: color-mix(in srgb, var(--card) 92%, white);
  border: 1px solid var(--line);
  box-shadow: 0 18px 50px rgba(23, 33, 43, .08);
  border-radius: 24px;
}
.week-card { padding: 18px; }
.week-card small { display: block; color: var(--muted); margin-top: 8px; }
.app-shell { padding: 22px clamp(12px, 4vw, 56px) 56px; display: grid; gap: 20px; }
.panel { padding: clamp(16px, 3vw, 26px); }
.panel-heading { display: flex; justify-content: space-between; gap: 16px; align-items: start; margin-bottom: 18px; }
.form-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
label { display: grid; gap: 7px; font-size: .9rem; color: #344054; font-weight: 700; }
select, input, button {
  min-height: 44px;
  border-radius: 14px;
  border: 1px solid #cfc7b9;
  background: white;
  padding: 10px 12px;
  font: inherit;
  color: var(--ink);
}
button { cursor: pointer; font-weight: 800; }
.primary { border-color: var(--accent); background: var(--accent); color: white; }
.ghost { border-color: var(--line); background: #fffaf0; color: var(--accent); }
.actions, .mini-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.actions { margin-top: 18px; }
.period-picker { margin-top: 18px; padding: 16px; background: var(--soft); border-radius: 18px; }
.period-options { display: flex; flex-wrap: wrap; gap: 10px; }
.period-check { display: inline-flex; align-items: center; gap: 8px; padding: 9px 12px; border-radius: 999px; background: white; border: 1px solid var(--line); font-weight: 800; }
.period-check input { min-height: auto; width: 18px; height: 18px; }
.lesson-preview { margin-top: 18px; display: grid; gap: 10px; }
.preview-row { padding: 12px 14px; border: 1px dashed #c9bda8; border-radius: 16px; background: #fffaf0; display: flex; justify-content: space-between; gap: 12px; }
.preview-row small { color: var(--muted); }
.week-table { display: grid; grid-template-columns: repeat(5, minmax(180px, 1fr)); gap: 12px; }
.day-column { background: #f9f6ef; border: 1px solid var(--line); border-radius: 20px; overflow: hidden; min-height: 180px; }
.day-title { padding: 13px 14px; background: var(--accent); color: white; font-weight: 900; }
.day-body { padding: 12px; display: grid; gap: 12px; }
.empty-day { color: var(--muted); font-style: italic; padding: 10px 2px; }
.cover-card { background: white; border: 1px solid var(--line); border-radius: 16px; padding: 12px; display: grid; gap: 9px; }
.cover-card.conflict { border-color: var(--danger); box-shadow: 0 0 0 2px rgba(180, 35, 24, .08); }
.card-top { display: flex; justify-content: space-between; gap: 8px; align-items: start; }
.period-pill { background: #17212b; color: white; border-radius: 999px; padding: 4px 9px; font-size: .78rem; font-weight: 900; white-space: nowrap; }
.lesson-text { color: #344054; font-size: .92rem; }
.cover-select { width: 100%; min-width: 0; }
.note { color: var(--muted); font-size: .82rem; }
.warning { color: var(--danger); font-size: .82rem; font-weight: 800; }
.google-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 12px; align-items: end; }
.muted, .status-line { color: var(--muted); }
.status-line.success { color: var(--accent); font-weight: 800; }
.status-line.error { color: var(--danger); font-weight: 800; }
.script-help { margin-top: 14px; background: #f9f6ef; border-radius: 16px; padding: 12px 14px; border: 1px solid var(--line); }
pre { white-space: pre-wrap; overflow: auto; background: #17212b; color: #f8fafc; padding: 14px; border-radius: 12px; font-size: .82rem; }
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .form-grid, .google-row { grid-template-columns: 1fr; }
  .panel-heading { flex-direction: column; }
  .week-table { grid-template-columns: 1fr; }
  .day-column { min-height: auto; }
}
@media (max-width: 560px) {
  .hero { padding-top: 22px; }
  .app-shell { padding-inline: 10px; }
  .panel, .week-card { border-radius: 18px; padding: 14px; }
  select, input, button { width: 100%; font-size: 16px; }
  .preview-row, .card-top { flex-direction: column; }
  .mini-actions { width: 100%; }
  .mini-actions button { flex: 1; }
}