:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --ink: #1c1f2b;
  --ink-soft: #5b6178;
  --ink-faint: #8b90a5;
  --line: #e4e6f0;
  --accent: #4f46e5;
  --accent-soft: #eef0ff;
  --accent-ink: #3730a3;
  --danger: #b42318;
  --danger-soft: #fef3f2;
  --ok: #067647;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(20, 24, 40, .05), 0 8px 24px rgba(20, 24, 40, .05);
}

* { box-sizing: border-box; }

html, body { margin: 0; }

body {
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.app {
  max-width: 940px;
  margin: 0 auto;
  padding: 32px 20px 56px;
}

.masthead {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 24px;
}

.brand { display: flex; gap: 14px; align-items: center; }

.mark {
  width: 38px; height: 38px;
  border-radius: 11px;
  background: linear-gradient(150deg, var(--accent), #7c74ff);
  box-shadow: inset 0 0 0 3px rgba(255,255,255,.35);
  flex: none;
}

h1 {
  margin: 0;
  font-size: 1.6rem;
  letter-spacing: -.02em;
  font-weight: 650;
}

.tagline { margin: 2px 0 0; color: var(--ink-soft); font-size: .875rem; }

.stats { display: flex; gap: 8px; margin: 0; }

.stat {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 14px;
  min-width: 74px;
  text-align: center;
}

.stat dt { font-size: .7rem; text-transform: uppercase; letter-spacing: .07em; color: var(--ink-faint); }
.stat dd { margin: 2px 0 0; font-size: 1.25rem; font-weight: 650; font-variant-numeric: tabular-nums; }

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 20px;
}

h2 {
  margin: 0 0 14px;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .09em;
  color: var(--ink-faint);
  font-weight: 650;
}

.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }

label { font-size: .82rem; font-weight: 600; color: var(--ink-soft); }
.req { color: var(--accent); }
.opt { font-weight: 400; color: var(--ink-faint); }

input[type="text"], input[type="search"], input[type="date"], textarea, select {
  font: inherit;
  color: var(--ink);
  background: #fbfbfe;
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 9px 11px;
  width: 100%;
  min-width: 0;
}

textarea { resize: vertical; }

input:focus-visible, textarea:focus-visible, select:focus-visible, button:focus-visible, li:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
  margin-top: 12px;
}

.row .field { flex: 1 1 150px; }
.row .btn { flex: 0 0 auto; }

.btn {
  font: inherit;
  font-weight: 600;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  padding: 9px 14px;
  cursor: pointer;
}

.btn:hover { background: #f4f5fb; }

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  padding: 10px 18px;
}

.btn.primary:hover { background: var(--accent-ink); }

.btn.ghost { background: transparent; }
.btn.small { padding: 6px 11px; font-size: .85rem; }
.btn.danger { color: var(--danger); }
.btn.danger:hover { background: var(--danger-soft); }

.error { margin: 0; color: var(--danger); font-size: .8rem; }

.list-head {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: flex-end;
  justify-content: space-between;
}

.list-head h2 { margin: 0; }

.controls { display: flex; flex-wrap: wrap; gap: 10px; }
.control { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.control input { width: 210px; max-width: 100%; }
.control select { width: 130px; max-width: 100%; }

.task-list { list-style: none; margin: 16px 0 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }

.task-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  border: 1px solid var(--line);
  border-left: 3px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  background: #fff;
}

.task-item[data-priority="high"] { border-left-color: #d92d20; }
.task-item[data-priority="medium"] { border-left-color: #f79009; }
.task-item[data-priority="low"] { border-left-color: #98a2b3; }
.task-item.done { background: #fbfbfd; }

.task-item input[type="checkbox"] {
  width: 18px; height: 18px; margin: 3px 0 0; flex: none; accent-color: var(--accent); cursor: pointer;
}

.body { flex: 1 1 auto; min-width: 0; }

.title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.task-item.done .title { text-decoration: line-through; color: var(--ink-faint); }

.notes {
  margin: 4px 0 0;
  color: var(--ink-soft);
  font-size: .875rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; align-items: center; }

.tag {
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 999px;
  background: #f1f2f7;
  color: var(--ink-soft);
}

.tag.high { background: #fef3f2; color: #b42318; }
.tag.medium { background: #fffaeb; color: #b54708; }
.tag.low { background: #f2f4f7; color: #475467; }
.tag.due { background: var(--accent-soft); color: var(--accent-ink); }
.tag.overdue { background: #fef3f2; color: var(--danger); }

.actions { display: flex; gap: 6px; flex: none; }

.edit-form { display: flex; flex-direction: column; gap: 10px; width: 100%; }
.edit-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: flex-end; }
.edit-row .field { flex: 1 1 140px; }
.edit-actions { display: flex; gap: 8px; }

.empty {
  margin: 18px 0 2px;
  padding: 26px 18px;
  text-align: center;
  border: 1px dashed var(--line);
  border-radius: 10px;
  color: var(--ink-soft);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.empty strong { color: var(--ink); }

.foot { color: var(--ink-faint); font-size: .8rem; text-align: center; }

@media (max-width: 560px) {
  .app { padding: 20px 14px 40px; }
  .masthead { align-items: flex-start; }
  .stats { width: 100%; }
  .stat { flex: 1 1 0; min-width: 0; padding: 8px 6px; }
  .panel { padding: 16px; }
  .row .field, .row .btn { flex: 1 1 100%; }
  .control { flex: 1 1 100%; }
  .control input, .control select { width: 100%; }
  .task-item { flex-wrap: wrap; }
  .actions { width: 100%; justify-content: flex-end; }
}