:root {
  --bg: #0f172a;
  --surface: #111827;
  --surface-2: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #38bdf8;
  --accent-2: #a78bfa;
  --success: #22c55e;
  --danger: #ef4444;
  --warning: #f59e0b;
  --card-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
}

[data-theme="light"] {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --text: #0f172a;
  --muted: #475569;
  --accent: #2563eb;
  --accent-2: #7c3aed;
  --card-shadow: 0 10px 28px rgba(15, 23, 42, 0.12);
}

[data-theme="sunset"] {
  --bg: #0f1221;
  --surface: #17182c;
  --surface-2: #1f2036;
  --text: #f8fafc;
  --muted: #cbd5e1;
  --accent: #f97316;
  --accent-2: #f43f5e;
  --card-shadow: 0 14px 34px rgba(244, 63, 94, 0.16);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: linear-gradient(145deg, var(--bg), var(--surface));
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  min-height: 100vh;
  padding: 24px;
}

.app-shell {
  max-width: 1100px;
  margin: 0 auto 48px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.topbar {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 20px;
  padding: 16px 18px;
  box-shadow: var(--card-shadow);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid;
  place-items: center;
  font-size: 20px;
  box-shadow: 0 12px 26px rgba(0, 0, 0, 0.2);
}

.brand h1 {
  margin: 0;
  font-size: 22px;
}

.brand p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.top-actions {
  display: flex;
  gap: 8px;
}

button,
select,
input,
textarea {
  font-family: inherit;
}

button {
  border: none;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.2);
}

button.ghost {
  background: var(--surface-2);
  color: var(--text);
}

button.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.stat {
  background: var(--surface);
  border-radius: 16px;
  padding: 14px;
  box-shadow: var(--card-shadow);
}

.stat .label {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 13px;
}

.stat .value {
  margin: 0;
  font-weight: 700;
}

.progress {
  width: 100%;
  height: 10px;
  background: var(--surface-2);
  border-radius: 999px;
  overflow: hidden;
}

.progress .bar {
  height: 100%;
  width: 0;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 999px;
  transition: width 180ms ease;
}

.controls {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 12px;
}

.card {
  background: var(--surface);
  border-radius: 16px;
  padding: 14px;
  box-shadow: var(--card-shadow);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.form-grid label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
}

.form-grid input,
.form-grid select,
.form-grid textarea {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--surface-2);
  background: var(--surface-2);
  color: var(--text);
}

.form-grid textarea {
  resize: vertical;
}

.form-grid .wide {
  grid-column: 1 / -1;
}

.form-actions {
  margin-top: 10px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.hint {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.filters {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px;
}

.filters input,
.filters select {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--surface-2);
  background: var(--surface-2);
  color: var(--text);
}

.tasks .section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.task-list {
  display: grid;
  gap: 10px;
  margin-top: 10px;
}

.task {
  background: var(--surface-2);
  border-radius: 14px;
  padding: 12px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  border: 1px solid transparent;
  transition: border-color 120ms ease, transform 120ms ease;
}

.task:hover {
  border-color: rgba(255, 255, 255, 0.08);
  transform: translateY(-1px);
}

.task.dragging {
  opacity: 0.5;
}

.task-header {
  display: flex;
  align-items: center;
  gap: 10px;
}

.badge {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  background: var(--surface);
  color: var(--text);
}

.priority-high {
  background: rgba(239, 68, 68, 0.12);
  color: #fca5a5;
}

.priority-medium {
  background: rgba(245, 158, 11, 0.12);
  color: #fcd34d;
}

.priority-low {
  background: rgba(34, 197, 94, 0.12);
  color: #86efac;
}

.task-title {
  margin: 0;
  font-weight: 700;
}

.task-meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 12px;
}

.task-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.task-actions button {
  padding: 8px 10px;
}

.subtasks {
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}

.subtasks li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}

.subtasks input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--muted);
}

.status-dot.overdue {
  background: var(--danger);
}

.status-dot.soon {
  background: var(--warning);
}

.toast {
  position: fixed;
  bottom: 18px;
  right: 18px;
  background: var(--surface);
  color: var(--text);
  padding: 12px 14px;
  border-radius: 12px;
  box-shadow: var(--card-shadow);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.hidden {
  display: none;
}

@media (max-width: 900px) {
  body {
    padding: 16px;
  }

  .controls {
    grid-template-columns: 1fr;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .task {
    grid-template-columns: 1fr;
  }
}