:root {
  --bg: #0d1117;
  --surface: #161b22;
  --surface-2: #1c2128;
  --border: #30363d;
  --text: #e6edf3;
  --text-dim: #8b949e;
  --accent: #58a6ff;
  --green: #2ea043;
  --green-dim: #1a4a24;
  --yellow: #d29922;
  --yellow-dim: #4a3a12;
  --gray: #30363d;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  padding: 0 0 3rem;
}

header {
  padding: 1.5rem 1.25rem 0.5rem;
  max-width: 960px;
  margin: 0 auto;
}

header h1 {
  font-size: 1.5rem;
  margin: 0 0 0.25rem;
}

header .subtitle {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin: 0;
}

.sync-badge {
  display: inline-block;
  margin-top: 0.6rem;
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-dim);
}
.badge-synced { color: var(--green); border-color: var(--green-dim); }
.badge-syncing, .badge-pending { color: var(--yellow); border-color: var(--yellow-dim); }
.badge-offline { color: #f85149; border-color: #4a1a1a; }
.badge-local { color: var(--text-dim); }

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem 1.25rem;
}

/* --- Stats --- */
.stats-panel {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem;
  text-align: center;
}

.stat-card__value {
  font-size: 1.4rem;
  font-weight: 700;
}

.stat-card__label {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 0.15rem;
}

.category-stats {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1.5rem;
}

.category-stats h2 {
  font-size: 0.95rem;
  margin: 0 0 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.cat-stat-row {
  display: grid;
  grid-template-columns: 130px 1fr 40px;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
  font-size: 0.85rem;
}

.cat-stat-row__label { color: var(--text); }
.cat-stat-row__bar-track {
  background: var(--surface-2);
  border-radius: 999px;
  height: 8px;
  overflow: hidden;
}
.cat-stat-row__bar-fill {
  background: var(--accent);
  height: 100%;
  border-radius: 999px;
}
.cat-stat-row__pct { text-align: right; color: var(--text-dim); }

/* --- Grid --- */
.grid-section h2 {
  font-size: 0.95rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0 0 0.75rem;
}

.day-grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 6px;
}

@media (max-width: 640px) {
  .day-grid { grid-template-columns: repeat(6, 1fr); }
  .stats-panel { grid-template-columns: 1fr 1fr; }
  .cat-stat-row { grid-template-columns: 100px 1fr 36px; font-size: 0.78rem; }
}

.day-tile {
  aspect-ratio: 1;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--gray);
  color: var(--text-dim);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.08s ease, filter 0.08s ease;
}

.day-tile:hover { transform: scale(1.08); filter: brightness(1.15); }
.day-tile:active { transform: scale(0.96); }

.day-tile--not-started { background: var(--surface-2); color: var(--text-dim); }
.day-tile--partial { background: var(--yellow-dim); color: var(--yellow); border-color: var(--yellow); }
.day-tile--complete { background: var(--green-dim); color: #7ee787; border-color: var(--green); }

.legend {
  display: flex;
  gap: 1rem;
  margin-top: 0.75rem;
  font-size: 0.78rem;
  color: var(--text-dim);
  flex-wrap: wrap;
}
.legend span { display: inline-flex; align-items: center; gap: 0.35rem; }
.legend-swatch { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }
.legend-swatch--gray { background: var(--surface-2); }
.legend-swatch--yellow { background: var(--yellow-dim); border: 1px solid var(--yellow); }
.legend-swatch--green { background: var(--green-dim); border: 1px solid var(--green); }

/* --- Modal --- */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 2rem 1rem;
  z-index: 100;
  overflow-y: auto;
}
.modal.modal--open { display: flex; }

.modal__content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 640px;
  width: 100%;
  padding: 1.25rem;
  margin-top: 1rem;
}

.modal__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.25rem;
}

.modal__header h2 { margin: 0; font-size: 1.2rem; }

.modal__close {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 1.4rem;
  cursor: pointer;
  line-height: 1;
  padding: 0.25rem;
}
.modal__close:hover { color: var(--text); }

.modal__progress {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.modal__nav {
  display: flex;
  justify-content: space-between;
  margin-top: 1.25rem;
  gap: 0.5rem;
}

.nav-btn {
  flex: 1;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.6rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.85rem;
}
.nav-btn:hover { background: var(--border); }

.task-item {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem;
  margin-bottom: 0.6rem;
  background: var(--surface-2);
}
.task-item--done { opacity: 0.55; }

.task-item__row {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  cursor: pointer;
}

.task-item__row input[type="checkbox"] {
  width: 20px;
  height: 20px;
  margin-top: 0.15rem;
  flex-shrink: 0;
  accent-color: var(--green);
}

.task-item__cat {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 0.15rem;
}

.task-item__title {
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.task-item__desc {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.4;
}

.task-item__links {
  margin-top: 0.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.task-item__links a {
  font-size: 0.8rem;
  color: var(--accent);
  text-decoration: none;
}
.task-item__links a:hover { text-decoration: underline; }