:root {
  color-scheme: dark;
  --bg: #0b1020;
  --card: #141c2e;
  --row: #0f1628;
  --text: #e8eefc;
  --muted: #9aa8c7;
  --accent: #f5c542;
  --border: #24304a;
  --high: #ff6b6b;
  --medium: #f5c542;
  --low: #6bcb77;
  --overdue-bg: rgba(255, 107, 107, 0.12);
  --overdue-border: #ff6b6b;
  --done: #5a6a8a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #1a2744 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.45;
}

.page {
  width: min(40rem, 100%);
  margin: 0 auto;
  padding: 1.25rem 1rem 2.5rem;
}

.hero {
  margin-bottom: 1.25rem;
}

.eyebrow {
  margin: 0 0 0.25rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

h1 {
  margin: 0 0 0.35rem;
  font-size: 1.6rem;
  letter-spacing: 0.02em;
}

.subtitle {
  margin: 0 0 0.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.tz {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
  opacity: 0.9;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.chip {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--row);
  color: var(--muted);
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.chip:hover,
.chip:focus-visible {
  border-color: var(--accent);
  color: var(--text);
  outline: none;
}

.chip.active {
  border-color: var(--accent);
  color: var(--bg);
  background: var(--accent);
  font-weight: 600;
}

.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1rem;
  margin-bottom: 1rem;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
}

.panel-head {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.panel-head h2,
.done-toggle h2 {
  margin: 0;
  font-size: 1.05rem;
}

.count {
  font-size: 0.8rem;
  color: var(--muted);
}

.list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.row {
  display: grid;
  gap: 0.35rem 0.75rem;
  background: var(--row);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 0.85rem 0.95rem;
}

.row.overdue {
  background: var(--overdue-bg);
  border-color: var(--overdue-border);
}

.row.done {
  opacity: 0.72;
}

.row-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.6rem;
}

.class-tag {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(245, 197, 66, 0.12);
  border: 1px solid rgba(245, 197, 66, 0.35);
  border-radius: 0.35rem;
  padding: 0.15rem 0.45rem;
}

.title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.75rem;
  font-size: 0.82rem;
  color: var(--muted);
}

.due {
  color: var(--text);
}

.due.overdue-text {
  color: var(--high);
  font-weight: 600;
}

.badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.12rem 0.5rem;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border: 1px solid transparent;
}

.badge.priority-high {
  color: var(--high);
  border-color: rgba(255, 107, 107, 0.45);
  background: rgba(255, 107, 107, 0.12);
}

.badge.priority-medium {
  color: var(--medium);
  border-color: rgba(245, 197, 66, 0.45);
  background: rgba(245, 197, 66, 0.12);
}

.badge.priority-low {
  color: var(--low);
  border-color: rgba(107, 203, 119, 0.45);
  background: rgba(107, 203, 119, 0.12);
}

.badge.status-open {
  color: var(--text);
  border-color: var(--border);
  background: rgba(232, 238, 252, 0.06);
}

.badge.status-done {
  color: var(--done);
  border-color: var(--border);
}

.badge.in-class {
  color: #8ec5ff;
  border-color: rgba(142, 197, 255, 0.4);
  background: rgba(142, 197, 255, 0.1);
}

.empty {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.done-panel {
  padding: 0;
  overflow: hidden;
}

.done-toggle {
  width: 100%;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  background: transparent;
  border: 0;
  color: inherit;
  padding: 1rem;
  cursor: pointer;
  text-align: left;
  font: inherit;
}

.done-toggle:hover,
.done-toggle:focus-visible {
  background: rgba(255, 255, 255, 0.03);
  outline: none;
}

.done-toggle .chevron {
  margin-left: auto;
  color: var(--muted);
  transition: transform 0.15s ease;
}

.done-toggle[aria-expanded="true"] .chevron {
  transform: rotate(90deg);
}

.done-body {
  padding: 0 1rem 1rem;
}

.footer {
  margin-top: 0.5rem;
  color: var(--muted);
  font-size: 0.8rem;
}

.footer p {
  margin: 0 0 0.5rem;
}

.footer code {
  font-size: 0.78rem;
  color: var(--accent);
  word-break: break-all;
}

.footer a {
  color: var(--accent);
  text-decoration: none;
}

.footer a:hover,
.footer a:focus-visible {
  text-decoration: underline;
  outline: none;
}

@media (min-width: 520px) {
  .row {
    grid-template-columns: 1fr auto;
    align-items: start;
  }

  .meta {
    grid-column: 1 / -1;
  }
}