:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #14141f;
  --bg-tertiary: #1e1e2e;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #606070;
  --accent: #00d4ff;
  --accent-secondary: #00ff88;
  --danger: #ff4466;
  --focus-ring: #00d4ff;
  --focus-glow: rgba(0, 212, 255, 0.4);
  --radius-md: 12px;
  --q1: #ff4466;
  --q2: #00d4ff;
  --q3: #ffb020;
  --q4: #7a7a8c;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  width: 600px; height: 600px; overflow: hidden;
  background: #000;
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  -webkit-font-smoothing: antialiased;
}

#app { width: 100%; height: 100%; position: relative; }

.screen {
  width: 100%; height: 100%; position: absolute; top: 0; left: 0;
  display: flex; flex-direction: column;
}
.screen.hidden { display: none; }

.focusable {
  transition: all 0.15s ease;
  border: 2px solid transparent;
  cursor: pointer;
  outline: none;
}
.focusable:focus {
  border-color: var(--focus-ring);
  box-shadow: 0 0 20px var(--focus-glow);
}
.hidden { display: none !important; }

/* ---------- Header ---------- */
.header {
  padding: 18px 22px 14px;
  border-bottom: 1px solid var(--bg-tertiary);
  background: var(--bg-primary);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-shrink: 0;
}
.header-row { align-items: center; gap: 12px; }
.header-titles { flex: 1; min-width: 0; }
.title {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.header-meta {
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 600;
}

.btn-back {
  width: 48px; height: 48px;
  flex-shrink: 0;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  display: flex; align-items: center; justify-content: center;
}

.q-chip {
  flex-shrink: 0;
  font-size: 16px;
  font-weight: 800;
  padding: 6px 12px;
  border-radius: 8px;
  background: var(--bg-tertiary);
  letter-spacing: 1px;
}

/* ---------- Matrix grid ---------- */
.matrix {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 10px;
  padding: 14px;
  min-height: 0;
}
.matrix-compact { flex: 1; }

.quadrant {
  position: relative;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 16px 16px 16px 22px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 4px;
  overflow: hidden;
  text-align: left;
  min-height: 88px;
}
.quadrant::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 6px;
  border-radius: 6px 0 0 6px;
}
.quadrant.q1::before { background: var(--q1); }
.quadrant.q2::before { background: var(--q2); }
.quadrant.q3::before { background: var(--q3); }
.quadrant.q4::before { background: var(--q4); }
.quadrant.focusable:focus { background: var(--bg-tertiary); }

.q-tag {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 1px;
}
.q1 .q-tag { color: var(--q1); }
.q2 .q-tag { color: var(--q2); }
.q3 .q-tag { color: var(--q3); }
.q4 .q-tag { color: var(--q4); }

.q-title {
  font-size: 19px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}
.q-sub {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.2;
}
.q-count {
  position: absolute;
  right: 14px;
  bottom: 12px;
  font-size: 34px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}
.q-count.zero { color: var(--text-muted); }

/* ---------- Footer / buttons ---------- */
.footer {
  padding: 14px 18px 18px;
  flex-shrink: 0;
  background: var(--bg-primary);
  border-top: 1px solid var(--bg-tertiary);
}
.footer-stack { display: flex; flex-direction: column; gap: 10px; }

.btn {
  width: 100%;
  min-height: 64px;
  border-radius: var(--radius-md);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text-primary);
  background: var(--bg-tertiary);
  display: flex; align-items: center; justify-content: center;
}
.btn-primary {
  background: linear-gradient(135deg, #0a3a44, #093540);
  color: var(--accent);
  border-color: rgba(0, 212, 255, 0.25);
}
.btn-primary.focusable:focus { color: #fff; }
.btn-action { background: var(--bg-tertiary); }
.btn-danger {
  background: rgba(255, 68, 102, 0.12);
  color: var(--danger);
  border-color: rgba(255, 68, 102, 0.3);
}
.btn-danger.focusable:focus {
  border-color: var(--danger);
  box-shadow: 0 0 20px rgba(255, 68, 102, 0.4);
}

/* ---------- Task list ---------- */
.task-list {
  flex: 1;
  overflow-y: auto;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.task-item {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  min-height: 60px;
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
}
.task-check {
  width: 26px; height: 26px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 2px solid var(--text-muted);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 800;
  color: var(--accent-secondary);
}
.task-item.done .task-check {
  border-color: var(--accent-secondary);
  background: rgba(0, 255, 136, 0.12);
}
.task-item.done .task-label {
  text-decoration: line-through;
  color: var(--text-muted);
}
.task-label {
  font-size: 17px;
  color: var(--text-primary);
  line-height: 1.3;
  word-break: break-word;
}

.empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-muted);
}
.empty-icon { font-size: 56px; line-height: 1; opacity: 0.5; }
.empty-text { font-size: 17px; color: var(--text-secondary); }
.empty-hint { font-size: 14px; color: var(--text-muted); }

/* ---------- Task detail ---------- */
.detail-body {
  flex: 1;
  padding: 18px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}
.detail-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 22px;
  border-left: 6px solid var(--text-muted);
}
.detail-card.q1 { border-left-color: var(--q1); }
.detail-card.q2 { border-left-color: var(--q2); }
.detail-card.q3 { border-left-color: var(--q3); }
.detail-card.q4 { border-left-color: var(--q4); }
.detail-chip {
  display: inline-block;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 1px;
  padding: 5px 11px;
  border-radius: 8px;
  background: var(--bg-tertiary);
  margin-bottom: 14px;
}
.detail-text {
  font-size: 24px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-primary);
  word-break: break-word;
}
.detail-text.done {
  text-decoration: line-through;
  color: var(--text-muted);
}
.detail-meta {
  margin-top: 16px;
  font-size: 14px;
  color: var(--text-secondary);
}

/* ---------- Add task / keyboard ---------- */
.input-preview {
  position: relative;
  margin: 16px 18px;
  padding: 16px 18px;
  min-height: 64px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 2px solid var(--bg-tertiary);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}
.input-text {
  font-size: 21px;
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-word;
}
.caret {
  font-size: 21px;
  color: var(--accent);
  animation: blink 1s steps(2, start) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.input-placeholder {
  position: absolute;
  left: 18px;
  font-size: 21px;
  color: var(--text-muted);
  pointer-events: none;
}
.input-placeholder.hidden { display: none; }

.keyboard {
  flex: 1;
  padding: 6px 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  justify-content: center;
}
.key-row {
  display: flex;
  justify-content: center;
  gap: 6px;
}
.key {
  width: 50px;
  height: 52px;
  flex-shrink: 0;
  background: var(--bg-tertiary);
  border-radius: 9px;
  color: var(--text-primary);
  font-size: 19px;
  font-weight: 600;
  display: flex; align-items: center; justify-content: center;
}
.key.key-wide { width: 130px; font-size: 15px; font-weight: 700; letter-spacing: 0.5px; }
.key.key-space { flex: 1; max-width: 200px; }
.key.key-done {
  background: linear-gradient(135deg, #0a3a44, #093540);
  color: var(--accent);
  font-weight: 800;
}
.key.key-done.focusable:focus { color: #fff; }
.key.key-bsp { color: var(--danger); }

/* ---------- Choose quadrant ---------- */
.prompt-text {
  padding: 16px 22px 4px;
  font-size: 16px;
  color: var(--text-secondary);
  font-weight: 600;
  flex-shrink: 0;
}