:root {
  --bg: #0f0f12;
  --surface: #18181c;
  --surface-hover: #1e1e24;
  --border: #2a2a32;
  --text: #e8e6e3;
  --text-muted: #9b98a0;
  --accent: #7c6ef7;
  --accent-hover: #9288f8;
  --success: #4ade80;
  --warning: #fbbf24;
  --urgent: #f87171;
  --radius: 10px;
  --radius-sm: 6px;
  --font-sans: 'DM Sans', system-ui, sans-serif;
  --font-serif: 'Instrument Serif', Georgia, serif;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}

.container { max-width: 820px; margin: 0 auto; padding: 0 1.25rem; }

/* Header */
.header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 0;
  position: sticky;
  top: 0;
  z-index: 50;
}
.logo {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 400;
  margin: 0 0 0.15rem 0;
  color: var(--text);
}
.tagline {
  margin: 0 0 1rem 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.stats {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}
.stat {
  color: var(--text-muted);
  font-size: 0.85rem;
}
.stat strong {
  color: var(--text);
  margin-right: 0.25rem;
}

/* Filters */
.filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
}
.filters label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.filters input[type="radio"] {
  accent-color: var(--accent);
  cursor: pointer;
}
.search-input {
  margin-left: auto;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font-size: 0.9rem;
  min-width: 180px;
}
.search-input::placeholder { color: var(--text-muted); }
.search-input:focus {
  outline: none;
  border-color: var(--accent);
}

/* Task list */
.task-list { padding-bottom: 3rem; }

.task-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  margin-bottom: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.task-card:hover {
  border-color: rgba(124, 110, 247, 0.35);
  box-shadow: var(--shadow);
}
.task-card.hidden { display: none; }

.task-header {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}
.task-num {
  flex-shrink: 0;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: var(--radius-sm);
  background: var(--border);
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.task-title {
  flex: 1;
  font-weight: 600;
  font-size: 1.05rem;
  margin: 0;
  line-height: 1.35;
  color: var(--text);
}
.task-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-bottom: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.task-type { font-style: italic; }
.task-assignee::before { content: "→ "; }
.priority {
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-weight: 500;
}
.priority.urgent { background: rgba(248, 113, 113, 0.2); color: var(--urgent); }
.priority.high { background: rgba(251, 191, 36, 0.2); color: var(--warning); }
.priority.normal { background: rgba(124, 110, 247, 0.15); color: var(--accent); }

.task-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0 0 1rem 0;
  line-height: 1.5;
}

.task-status-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}
.task-status-row label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.task-status-row select {
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-hover);
  color: var(--text);
  font-size: 0.85rem;
  cursor: pointer;
  accent-color: var(--accent);
}
.task-status-row select:focus { outline: none; border-color: var(--accent); }

.follow-up-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin: 0 0 0.5rem 0;
}
.follow-up-list { list-style: none; padding: 0; margin: 0; }
.follow-up-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid rgba(42, 42, 50, 0.6);
  font-size: 0.9rem;
  color: var(--text);
}
.follow-up-item:last-child { border-bottom: none; }
.follow-up-item input[type="checkbox"] {
  flex-shrink: 0;
  width: 1.1rem;
  height: 1.1rem;
  accent-color: var(--success);
  cursor: pointer;
}
.follow-up-item.done { color: var(--text-muted); }
.follow-up-item.done .follow-up-text { text-decoration: line-through; }

.follow-up-progress {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 1rem 0;
  margin-top: 2rem;
}
.footer p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.footer code {
  background: var(--surface);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.75rem;
}

@media (max-width: 600px) {
  .filters { flex-direction: column; align-items: stretch; }
  .search-input { margin-left: 0; min-width: 100%; }
}