:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1a1d23;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --primary: #1d4ed8;
  --primary-text: #ffffff;
  --overdue: #dc2626;
  --overdue-bg: #fef2f2;
  --tomorrow: #b45309;
  --acc: #1d4ed8;
  --acc-bg: #dbeafe;
  --p1: #dc2626;
  --p2: #d97706;
  --p3: #ca8a04;
  --p4: #6b7280;
  --done: #9ca3af;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; }

/* Several components below (.sheet-backdrop, .toast, .filter-row, .sheet-danger-actions)
   set their own `display` value directly on an element that's also toggled via the
   `hidden` attribute/property. An author-stylesheet `display` rule always beats the
   browser's built-in `[hidden] { display: none }` default regardless of specificity or
   source order, so without this line those elements never actually hide -- which is
   exactly what broke the Add-task sheet's Cancel button. */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

body { padding-bottom: calc(90px + var(--safe-bottom)); }

/* ---- Login page ---- */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}
.login-card {
  background: var(--card);
  border-radius: 16px;
  padding: 32px 24px;
  max-width: 360px;
  width: 100%;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  text-align: center;
}
.login-card h1 { margin: 0 0 8px; font-size: 1.4rem; }
.login-sub { color: var(--text-muted); margin: 0 0 20px; }
#login-form { display: flex; flex-direction: column; gap: 12px; }
#passcode {
  font-size: 1.5rem;
  text-align: center;
  letter-spacing: 0.2em;
  padding: 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
}
.login-error { color: var(--overdue); margin-top: 14px; }
.login-help { margin-top: 18px; font-size: 0.85rem; }
.login-help a { color: var(--text-muted); }

/* ---- App shell ---- */
.topbar {
  background: var(--primary);
  color: var(--primary-text);
  padding: 16px 16px 12px;
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar h1 { margin: 0 0 12px; font-size: 1.25rem; }

.list-toggle, .filter-row, .segmented {
  display: flex;
  gap: 8px;
}
.filter-row {
  padding: 10px 16px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}
.show-all-row {
  padding: 8px 16px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
}
.show-all-label { display: flex; align-items: center; gap: 8px; }
.show-all-label input { width: 18px; height: 18px; }

.toggle-btn, .filter-btn {
  flex: 1;
  padding: 12px;
  border: none;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 44px;
}
.toggle-btn {
  background: rgba(255,255,255,0.15);
  color: var(--primary-text);
}
.toggle-btn.active { background: #ffffff; color: var(--primary); }

.filter-btn {
  background: var(--bg);
  color: var(--text);
}
.filter-btn.active { background: var(--acc-bg); color: var(--acc); }

/* ---- Sections ---- */
.sections { padding: 8px 12px 20px; }

.app-footer { text-align: center; padding: 8px 20px 24px; }
.app-footer a { color: var(--text-muted); font-size: 0.82rem; text-decoration: none; }
.app-footer a:hover { text-decoration: underline; }

.section {
  margin-top: 18px;
}
.section-header {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 4px 4px 8px;
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
}
.section-header .count {
  font-weight: 500;
  text-transform: none;
  letter-spacing: normal;
}
.section-header.overdue { color: var(--overdue); }

.section-empty {
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 6px 4px 0;
}

.task-card {
  background: var(--card);
  border-radius: 12px;
  padding: 12px 12px 12px 10px;
  margin-bottom: 8px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  border: 1px solid var(--border);
}
.task-card.overdue { border-color: var(--overdue); background: var(--overdue-bg); }
.task-card.done { opacity: 0.6; }

.check-tap {
  flex: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--card);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: transparent;
  margin-top: 2px;
}
.task-card.done .check-tap { background: var(--done); border-color: var(--done); color: white; }
.task-card.overdue .check-tap { border-color: var(--overdue); }

.task-body { flex: 1; min-width: 0; }
.task-name { font-size: 1rem; font-weight: 600; word-break: break-word; }
.task-card.done .task-name { text-decoration: line-through; color: var(--text-muted); }

.task-meta {
  margin-top: 4px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.due-label.overdue { color: var(--overdue); font-weight: 600; }
.due-label.tomorrow { color: var(--tomorrow); font-weight: 600; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
}
.badge-acc { background: var(--acc-bg); color: var(--acc); }
.badge-p1 { background: #fee2e2; color: var(--p1); }
.badge-p2 { background: #fef3c7; color: var(--p2); }
.badge-p3 { background: #fef9c3; color: var(--p3); }
.badge-p4 { background: #f3f4f6; color: var(--p4); }

.task-notes {
  margin-top: 4px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ---- FAB ---- */
.fab {
  position: fixed;
  right: 20px;
  bottom: calc(20px + var(--safe-bottom));
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  font-size: 2rem;
  line-height: 1;
  border: none;
  box-shadow: 0 4px 14px rgba(0,0,0,0.25);
  cursor: pointer;
  z-index: 20;
}

/* ---- Toast ---- */
.toast {
  position: fixed;
  left: 16px;
  right: 16px;
  bottom: calc(90px + var(--safe-bottom));
  background: #1a1d23;
  color: white;
  padding: 12px 16px;
  border-radius: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  z-index: 30;
}
.toast button {
  background: none;
  border: none;
  color: #93c5fd;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  flex: none;
}

/* ---- Sheet (add/edit) ---- */
.sheet-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  display: flex;
  align-items: flex-end;
  z-index: 40;
}
.sheet {
  background: var(--card);
  width: 100%;
  max-height: 88vh;
  overflow-y: auto;
  border-radius: 20px 20px 0 0;
  padding: 20px 20px calc(20px + var(--safe-bottom));
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.sheet h2 { margin: 0; }
.sheet label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.sheet input[type="text"],
.sheet input[type="date"],
.sheet input[type="number"],
.sheet textarea {
  font-size: 1rem;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-family: inherit;
  color: var(--text);
}
.field-label { display: block; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 6px; }

.seg-btn, .preset-btn {
  flex: 1;
  padding: 10px 6px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
  min-height: 44px;
}
.seg-btn.active { background: var(--acc-bg); border-color: var(--acc); color: var(--acc); }

.recurrence-presets {
  display: flex;
  gap: 8px;
  margin-top: -6px;
}
.preset-btn { flex: 1; font-size: 0.78rem; padding: 8px 4px; min-height: 38px; }

.sheet-actions, .sheet-danger-actions {
  display: flex;
  gap: 10px;
  margin-top: 6px;
}
.btn-primary, .btn-secondary, .btn-danger {
  flex: 1;
  padding: 14px;
  border-radius: 12px;
  border: none;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  min-height: 48px;
}
.btn-primary { background: var(--primary); color: white; }
.btn-secondary { background: var(--bg); color: var(--text); border: 1px solid var(--border); }
.btn-danger { background: #fee2e2; color: var(--overdue); }

@media (min-width: 640px) {
  body { max-width: 480px; margin: 0 auto; }
}