:root {
  --bg: #f5f6fa;
  --panel: #ffffff;
  --panel-2: #f0f2f7;
  --text: #1d2130;
  --muted: #6b7183;
  --border: #e2e5ee;
  --accent: #4f46e5;
  --accent-text: #ffffff;
  --accent-weak: #ecedff;
  --danger: #dc2626;
  --overdue: #dc2626;
  --today: #d97706;
  --ok: #16a34a;
  --p1: #60a5fa;
  --p2: #f59e0b;
  --p3: #ef4444;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111319;
    --panel: #1a1d26;
    --panel-2: #222633;
    --text: #e6e8ef;
    --muted: #9399ad;
    --border: #2c303d;
    --accent: #818cf8;
    --accent-text: #0f1020;
    --accent-weak: #262a45;
    --danger: #f87171;
    --overdue: #f87171;
    --today: #fbbf24;
    --ok: #4ade80;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

button, input, select, textarea { font: inherit; color: inherit; }
input, select, textarea {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 11px;
  min-width: 0;
  width: 100%;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--accent); flex: none; }
input[type="color"] { width: 40px; height: 38px; padding: 3px; flex: none; cursor: pointer; }
textarea { resize: vertical; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 14px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--panel); cursor: pointer; text-decoration: none; white-space: nowrap;
}
.btn:hover { background: var(--panel-2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.danger { color: var(--danger); }
.icon-btn {
  background: none; border: none; cursor: pointer; padding: 6px 8px; border-radius: 6px;
  color: var(--muted); flex: none;
}
.icon-btn:hover:not(:disabled) { background: var(--panel-2); color: var(--text); }
.icon-btn:disabled { opacity: 0.3; cursor: default; }
.icon-btn.danger:hover { color: var(--danger); }
.link { background: none; border: none; color: var(--accent); font-weight: 600; cursor: pointer; padding: 0 4px; }
.muted { color: var(--muted); }
.error { color: var(--danger); margin: 0; }

/* Login */
.login { min-height: 100%; display: grid; place-items: center; padding: 16px; }
.login-card {
  width: 100%; max-width: 340px; background: var(--panel); border: 1px solid var(--border);
  border-radius: 16px; padding: 28px; display: flex; flex-direction: column; gap: 12px;
  align-items: center; box-shadow: var(--shadow);
}
.login-card h1 { margin: 0 0 8px; font-size: 22px; }
.login-card .btn { width: 100%; }

/* App layout */
.app { display: grid; grid-template-columns: 250px 1fr; height: 100dvh; }
.sidebar {
  background: var(--panel); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; padding: 16px 10px; overflow-y: auto;
  padding-top: max(16px, env(safe-area-inset-top));
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; padding: 4px 10px 16px; }
.nav { display: flex; flex-direction: column; gap: 2px; }
.nav-heading { font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); padding: 18px 10px 6px; }
.nav-item {
  display: flex; align-items: center; gap: 10px; width: 100%; text-align: left;
  background: none; border: none; border-radius: 8px; padding: 8px 10px; cursor: pointer;
}
.nav-item:hover { background: var(--panel-2); }
.nav-item.active { background: var(--accent-weak); color: var(--accent); font-weight: 600; }
.nav-icon { width: 20px; text-align: center; }
.nav-label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.count { font-size: 12px; color: var(--muted); background: var(--panel-2); border-radius: 999px; padding: 1px 8px; }
.count.alert { background: var(--overdue); color: #fff; }
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; flex: none; margin: 0 5px; }
.chip .dot { width: 8px; height: 8px; margin: 0 2px 0 0; }
.sidebar-foot { margin-top: auto; padding-top: 16px; }
.scrim { display: none; }

.main { display: flex; flex-direction: column; min-width: 0; height: 100dvh; }
.topbar {
  display: flex; align-items: center; gap: 12px; padding: 16px 24px 8px;
  padding-top: max(16px, env(safe-area-inset-top));
}
.topbar h2 { margin: 0; font-size: 22px; flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.topbar input[type="search"] { max-width: 260px; }
.menu-btn { display: none; font-size: 20px; color: var(--text); }

.quick-add { display: flex; gap: 8px; padding: 8px 24px 12px; }
.list { flex: 1; overflow-y: auto; padding: 0 24px 40px; padding-bottom: max(40px, env(safe-area-inset-bottom)); }

.group { margin-top: 14px; }
.group-title { font-size: 13px; text-transform: uppercase; letter-spacing: 0.05em; margin: 0 0 8px; color: var(--muted); }
.group-title.overdue { color: var(--overdue); }

.task {
  display: flex; gap: 12px; align-items: flex-start;
  background: var(--panel); border: 1px solid var(--border); border-left: 4px solid var(--border);
  border-radius: var(--radius); padding: 11px 12px; margin-bottom: 8px; cursor: pointer; box-shadow: var(--shadow);
}
.task:hover { border-color: var(--accent); }
.task:focus-visible { outline: 2px solid var(--accent); }
.task.p1 { border-left-color: var(--p1); }
.task.p2 { border-left-color: var(--p2); }
.task.p3 { border-left-color: var(--p3); }
.check {
  flex: none; width: 24px; height: 24px; margin-top: 1px; border-radius: 50%;
  border: 2px solid var(--muted); background: none; cursor: pointer; padding: 0;
  color: #fff; font-size: 14px; line-height: 1; display: grid; place-items: center;
}
.check:hover { border-color: var(--ok); background: color-mix(in srgb, var(--ok) 15%, transparent); }
.task.done .check { background: var(--ok); border-color: var(--ok); }
.task.done .task-title { text-decoration: line-through; color: var(--muted); }
.task-body { flex: 1; min-width: 0; }
.task-title { overflow-wrap: anywhere; }
.task-meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.chip {
  display: inline-flex; align-items: center; font-size: 12px; color: var(--muted);
  background: var(--panel-2); border: none; border-radius: 999px; padding: 2px 8px; white-space: nowrap;
}
.chip.tag { cursor: pointer; color: var(--accent); }
.chip.tag:hover { background: var(--accent-weak); }
.chip.due.overdue { color: #fff; background: var(--overdue); }
.chip.due.today { color: var(--today); font-weight: 600; }
.chip.p3 { color: var(--p3); }
.chip.p2 { color: var(--p2); }
.empty { text-align: center; color: var(--muted); padding: 60px 16px; font-size: 16px; }

/* Dialogs */
dialog {
  border: none; border-radius: 14px; padding: 0; width: min(560px, calc(100vw - 24px));
  max-height: calc(100dvh - 24px); background: var(--panel); color: var(--text);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}
dialog::backdrop { background: rgba(10, 12, 20, 0.5); }
.dialog-body { display: flex; flex-direction: column; gap: 14px; padding: 20px; }
.dialog-body h3 { margin: 0; font-size: 19px; }
.field { display: flex; flex-direction: column; gap: 5px; flex: 1; min-width: 0; }
.field > span { font-size: 13px; color: var(--muted); font-weight: 600; }
.field.narrow { flex: 0 0 80px; }
.row { display: flex; gap: 12px; }
.row.wrap { flex-wrap: wrap; align-items: center; }
.quick-dates { display: flex; flex-wrap: wrap; gap: 6px; margin-top: -6px; }
.chip-btn {
  font-size: 13px; background: var(--panel-2); border: 1px solid var(--border);
  border-radius: 999px; padding: 4px 10px; cursor: pointer;
}
.chip-btn:hover { border-color: var(--accent); }
.subtasks { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.subtask { display: flex; align-items: center; gap: 8px; }
.subtask input[type="text"] { padding: 6px 9px; }
.subtask-add { display: flex; gap: 8px; }
.dialog-actions { display: flex; gap: 8px; align-items: center; padding-top: 4px; }
.spacer { flex: 1; }

.settings-section { border-top: 1px solid var(--border); padding-top: 12px; }
.settings-section h4 { margin: 0 0 10px; }
.settings-section p { margin: 0 0 10px; font-size: 14px; }
.cat-edit-list { list-style: none; margin: 0 0 10px; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.cat-edit, .cat-add { display: flex; align-items: center; gap: 6px; }
.import-row { margin-top: 10px; }
.import-row input[type="file"] { flex: 1 1 200px; padding: 6px; }
.import-row select { flex: 1 1 200px; width: auto; }

.toast {
  position: fixed; left: 50%; transform: translateX(-50%);
  bottom: max(20px, env(safe-area-inset-bottom)); z-index: 50;
  background: #1d2130; color: #fff; padding: 10px 16px; border-radius: 10px;
  display: flex; gap: 12px; align-items: center; max-width: calc(100vw - 32px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}
.toast .link { color: #a5b4fc; }

/* Mobile */
@media (max-width: 800px) {
  .app { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed; inset: 0 auto 0 0; width: 280px; max-width: 85vw; z-index: 30;
    transform: translateX(-100%); transition: transform 0.2s ease;
  }
  body.nav-open .sidebar { transform: none; box-shadow: 0 0 40px rgba(0, 0, 0, 0.3); }
  body.nav-open .scrim { display: block; position: fixed; inset: 0; z-index: 20; background: rgba(10, 12, 20, 0.4); }
  .menu-btn { display: block; }
  .topbar { padding: 12px 16px 6px; padding-top: max(12px, env(safe-area-inset-top)); flex-wrap: wrap; }
  .topbar h2 { font-size: 20px; }
  .topbar input[type="search"] { max-width: none; flex-basis: 100%; order: 3; }
  .quick-add { padding: 6px 16px 10px; }
  #new-detailed { padding: 9px 10px; }
  .list { padding: 0 16px 40px; }
  .row { flex-wrap: wrap; }
  .row .field { flex: 1 1 140px; }
  .row .field.narrow { flex: 0 0 80px; }
  .dialog-body { padding: 16px; }
}

/* Times in the task dialog */
input:disabled { opacity: 0.5; }
.day-preview { background: var(--panel-2); border-radius: 8px; padding: 10px 12px; margin-top: -4px; font-size: 14px; }
.day-head { font-weight: 600; margin-bottom: 4px; color: var(--muted); }
.day-head.clash { color: var(--today); }
.day-preview ul { list-style: none; margin: 0; padding: 0; }
.day-preview li { padding: 2px 0; }
.day-preview li.clash { color: var(--today); font-weight: 600; }
.day-time { font-variant-numeric: tabular-nums; color: var(--muted); }
.day-preview li.clash .day-time { color: inherit; }

/* Calendar */
.cal-nav { display: flex; gap: 8px; padding: 0 24px 8px; align-items: center; }
.cal-nav input[type="date"] { max-width: 180px; }
.week-strip { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; margin-top: 6px; }
.week-day {
  display: flex; flex-direction: column; align-items: center; gap: 1px; padding: 6px 0;
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px; cursor: pointer;
}
.week-day:hover { border-color: var(--accent); }
.week-day .wd { font-size: 12px; color: var(--muted); }
.week-day .dn { font-size: 17px; font-weight: 600; }
.week-day .dots { font-size: 12px; line-height: 1; min-height: 12px; color: var(--accent); letter-spacing: 1px; }
.week-day.today .dn { color: var(--accent); }
.week-day.active { background: var(--accent); border-color: var(--accent); }
.week-day.active .wd, .week-day.active .dn, .week-day.active .dots { color: var(--accent-text); }

.timeline {
  position: relative; background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
}
.hour { position: absolute; left: 0; right: 0; border-top: 1px solid var(--border); cursor: copy; }
.hour:first-child { border-top: none; }
.hour:hover { background: var(--panel-2); }
.hour-label {
  position: absolute; left: 8px; top: 3px; font-size: 11px; color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.block {
  position: absolute; display: flex; flex-direction: column; align-items: flex-start; gap: 1px;
  overflow: hidden; text-align: left; padding: 3px 7px; margin-top: 1px; cursor: pointer;
  background: var(--accent-weak); border: 1px solid var(--border); border-left: 4px solid var(--accent);
  border-radius: 6px; font-size: 13px; line-height: 1.25;
}
.block:hover { filter: brightness(0.97); border-color: var(--accent); }
.block.short { flex-direction: row; align-items: center; gap: 6px; white-space: nowrap; }
.block-time { font-size: 11px; color: var(--muted); font-variant-numeric: tabular-nums; flex: none; }
.block-title { font-weight: 600; overflow: hidden; text-overflow: ellipsis; max-width: 100%; }
.block.short .block-title { white-space: nowrap; }
.block.done { opacity: 0.55; }
.block.done .block-title { text-decoration: line-through; }
.block.projected { background: transparent; border-style: dashed; border-left-style: solid; }
.now-line { position: absolute; left: 48px; right: 0; height: 2px; background: var(--overdue); pointer-events: none; }
.now-line::before {
  content: ""; position: absolute; left: -4px; top: -3px; width: 8px; height: 8px;
  border-radius: 50%; background: var(--overdue);
}

@media (max-width: 800px) {
  .cal-nav { padding: 0 16px 8px; }
  .cal-nav input[type="date"] { max-width: none; flex: 1; }
  .week-strip { gap: 4px; }
}
.block.short .block-time { order: 2; }