/* ---------- Theme tokens ---------- */
:root {
  --bg: #121212;
  --text: #ffffff;
  --card: #1e1e1e;
  --card-2: #2a2a2a;
  --muted: #444;
  --muted-2: #333;
  --accent: #ffcc00;
  --accent-2: #ffaa00;
  --danger: #f44336;
  --ok: #22c55e;
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
}

:root[data-theme="light"] {
  --bg: #f6f7fb;
  --text: #101114;
  --card: #ffffff;
  --card-2: #f0f2f5;
  --muted: #cfd3da;
  --muted-2: #e6e9ef;
  --accent: #ffb703;
  --accent-2: #ffa101;
  --shadow: 0 10px 24px rgba(0, 0, 0, 0.08);
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: grid;
  place-items: start center;
  padding: 32px 16px;
}

/* ---------- Container ---------- */
.todo-container {
  width: min(820px, 100%);
  background: var(--card);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 20px;
}

/* ---------- Header ---------- */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}
.title { margin: 0; font-size: 28px; letter-spacing: 0.3px; }
.theme-toggle {
  border: 1px solid var(--muted);
  background: var(--card-2);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 10px;
  cursor: pointer;
}

/* ---------- Rows ---------- */
.input-row, .filter-row {
  display: grid;
  grid-template-columns: 1fr 150px 160px 110px; /* input, date, category, button */
  gap: 10px;
  margin: 10px 0 14px;
}
.filter-row {
  grid-template-columns: 1fr 200px 160px; /* search, category filter, status */
}

@media (max-width: 720px) {
  .input-row { grid-template-columns: 1fr 1fr; }
  .input-row #taskCategory { grid-column: 1 / 2; }
  .input-row #addTaskBtn { grid-column: 2 / 3; }
  .filter-row { grid-template-columns: 1fr 1fr; }
  .filter-row #filterStatus { grid-column: 1 / -1; }
}

/* ---------- Inputs & buttons ---------- */
input, select, button {
  font-size: 14px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--muted);
  background: var(--card-2);
  color: var(--text);
  outline: none;
}
input::placeholder { opacity: 0.7; }

.btn-primary {
  border: none;
  background: var(--accent);
  color: #111;
  font-weight: 600;
  cursor: pointer;
  transition: transform .05s ease, background .2s ease;
}
.btn-primary:active { transform: translateY(1px); }
.btn-primary:hover { background: var(--accent-2); }

/* ---------- Empty state ---------- */
.empty {
  text-align: center;
  opacity: 0.7;
  margin: 6px 0 12px;
}

/* ---------- Task list ---------- */
.task-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }

.task {
  display: grid;
  grid-template-columns: 28px 1fr auto auto auto;
  align-items: center;
  gap: 10px;
  background: var(--card-2);
  border: 1px solid var(--muted);
  border-radius: 12px;
  padding: 10px 12px;
}

.task__title {
  font-weight: 600;
}
.task__meta {
  font-size: 12px;
  opacity: 0.75;
}
.badge {
  background: var(--muted-2);
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 12px;
}

/* action buttons */
.icon-btn {
  border: 1px solid var(--muted);
  background: transparent;
  color: var(--text);
  border-radius: 10px;
  padding: 6px 8px;
  cursor: pointer;
}
.icon-btn--ok { border-color: #2e7d32; }
.icon-btn--danger { border-color: #8b0000; }

/* completed style */
.task.completed .task__title { text-decoration: line-through; opacity: 0.7; }
.task.completed { opacity: 0.85; }