:root {
  color-scheme: light dark;
  --bg: #f5f5f4;
  --panel: #ffffff;
  --text: #1c1c1c;
  --muted: #8a8a8a;
  --border: #e4e4e4;
  --accent: #2563eb;
  --danger: #dc2626;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16171a;
    --panel: #1f2023;
    --text: #eee;
    --muted: #888;
    --border: #2c2d31;
    --accent: #5b8def;
    --danger: #f26262;
  }
}

* { box-sizing: border-box; }

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

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border);
}

.topbar h1 {
  margin: 0;
  font-size: 1.25rem;
}

.topbar h1 a {
  color: inherit;
  text-decoration: none;
}

.topbar nav {
  display: flex;
  gap: 1.25rem;
}

.topbar nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  padding-bottom: 0.2rem;
  border-bottom: 2px solid transparent;
}

.topbar nav a:hover {
  color: var(--text);
}

.topbar nav a[aria-current="page"] {
  color: var(--text);
  border-bottom-color: var(--accent);
}

.page {
  max-width: 640px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
}

.home {
  max-width: 900px;
  margin: 0 auto;
  padding: 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1.25rem;
}

@media (max-width: 500px) {
  .home { grid-template-columns: 1fr; }
}

.home-card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s;
}

.home-card:hover {
  border-color: var(--accent);
}

.home-card h2 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.home-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.column {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
}

.setup-footer {
  max-width: 900px;
  margin: 0.5rem auto 0;
  padding: 0 1.5rem 2rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.setup-footer button {
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-size: 0.85rem;
  cursor: pointer;
}

.setup-footer button:hover {
  color: var(--text);
  border-color: var(--accent);
}

.setup-footer #setup-status {
  color: var(--muted);
  font-size: 0.85rem;
}

.add-form {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.add-form input {
  flex: 1;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: transparent;
  color: var(--text);
  font-size: 0.95rem;
}

.add-form button {
  padding: 0.5rem 0.75rem;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: white;
  font-size: 0.9rem;
  cursor: pointer;
}

.add-form button:hover { opacity: 0.9; }

.item-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.4rem;
  border-radius: 6px;
  cursor: grab;
}

.item:hover {
  background: color-mix(in srgb, var(--border) 40%, transparent);
}

.item.dragging {
  opacity: 0.4;
}

.item input[type="checkbox"] {
  width: 1.05rem;
  height: 1.05rem;
  flex-shrink: 0;
  accent-color: var(--accent);
}

.item .text {
  flex: 1;
  font-size: 0.95rem;
  word-break: break-word;
}

.item.done .text {
  text-decoration: line-through;
  color: var(--muted);
}

.item .delete-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  opacity: 0;
}

.item:hover .delete-btn,
.item:focus-within .delete-btn {
  opacity: 1;
}

@media (hover: none) {
  .item .delete-btn {
    opacity: 1;
  }
}

.item .delete-btn:hover {
  color: var(--danger);
}

.empty-hint {
  color: var(--muted);
  font-size: 0.85rem;
  padding: 0.5rem 0.4rem;
}