:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1f242d;
  --border: #2a313d;
  --text: #e6e9ef;
  --muted: #8b94a7;
  --accent: #6ea8fe;
  --accent-2: #4ade80;
  --danger: #f87171;
  --warning: #fbbf24;
}
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0; background: var(--bg); color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
button {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  padding: 6px 10px; border-radius: 6px; cursor: pointer; font-size: 13px;
}
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); color: #0b1220; border-color: var(--accent); font-weight: 600; }
button.primary:hover { filter: brightness(1.05); }
button.danger { color: var(--danger); }
button.ghost { background: transparent; }
input, select, textarea {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  padding: 6px 10px; border-radius: 6px; font-size: 13px; font-family: inherit;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }
input[type="checkbox"] { width: 18px; height: 18px; }

header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px; border-bottom: 1px solid var(--border); background: var(--panel);
  position: sticky; top: 0; z-index: 10;
}
header h1 { margin: 0; font-size: 18px; font-weight: 600; letter-spacing: 0.2px; }
header .actions { display: flex; gap: 8px; align-items: center; }
header .status { font-size: 12px; color: var(--muted); margin-right: 8px; }

nav.tabs { display: flex; gap: 4px; padding: 10px 20px 0; border-bottom: 1px solid var(--border); background: var(--panel); }
nav.tabs button {
  background: transparent; border: 1px solid transparent; border-bottom: none;
  border-radius: 6px 6px 0 0; padding: 8px 14px; color: var(--muted);
}
nav.tabs button.active { background: var(--bg); border-color: var(--border); color: var(--text); }

main { padding: 20px; max-width: 1000px; margin: 0 auto; }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 16px; margin-bottom: 16px; }
.panel h2 { margin: 0 0 12px; font-size: 15px; font-weight: 600; color: var(--text); }
.row { display: flex; gap: 8px; align-items: center; }
.col { display: flex; flex-direction: column; gap: 8px; }
.grid { display: grid; gap: 8px; }
.muted { color: var(--muted); font-size: 12px; }
.pill { display: inline-block; padding: 2px 8px; border-radius: 10px; background: var(--panel-2); color: var(--muted); font-size: 11px; }
.streak-pill {
  display: inline-block; padding: 2px 8px; border-radius: 10px;
  background: rgba(251, 146, 60, 0.15); color: #fb923c; font-size: 11px; font-weight: 600;
  border: 1px solid rgba(251, 146, 60, 0.35); margin-left: 4px;
}
.error { color: var(--danger); }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 13px; }
th { color: var(--muted); font-weight: 500; font-size: 12px; }
tr:last-child td { border-bottom: none; }

.habit-row {
  display: grid; grid-template-columns: 1fr auto auto; gap: 12px; align-items: center;
  padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; margin-bottom: 8px; background: var(--panel-2);
}
.habit-row .name { font-weight: 500; }
.habit-row .target { color: var(--muted); font-size: 12px; }
.habit-row.done { border-color: var(--accent-2); }
.habit-row.partial { border-color: var(--warning); }
.habit-row input[type="number"] { width: 90px; }
kbd {
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 3px;
  padding: 1px 5px; font-size: 11px; font-family: ui-monospace, Menlo, monospace;
}

.day-nav { display: flex; gap: 8px; align-items: center; margin-bottom: 12px; }
.day-nav .date { font-weight: 600; font-size: 16px; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; }
.stat { background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px; padding: 12px; }
.stat .label { color: var(--muted); font-size: 12px; }
.stat .value { font-size: 20px; font-weight: 600; margin-top: 4px; }

.hidden { display: none !important; }

/* Toast notifications (used for save / update / cleared / error feedback) */
.toast-container {
  position: fixed; top: 72px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; gap: 8px;
  z-index: 100; pointer-events: none;
}
.toast {
  background: var(--panel); color: var(--text);
  border: 1px solid var(--border); border-left-width: 4px;
  border-radius: 8px; padding: 12px 18px;
  font-size: 14px; font-weight: 500;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  min-width: 240px; max-width: 480px;
  pointer-events: auto;
  animation: toast-in 0.22s ease-out, toast-out 0.3s ease-in 2.4s forwards;
}
.toast .label { display: block; font-size: 11px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 4px; }
.toast.saved   { border-left-color: var(--accent); }
.toast.saved   .label { color: var(--accent); }
.toast.updated { border-left-color: var(--accent-2); }
.toast.updated .label { color: var(--accent-2); }
.toast.cleared { border-left-color: var(--muted); }
.toast.cleared .label { color: var(--muted); }
.toast.error   { border-left-color: var(--danger); }
.toast.error   .label { color: var(--danger); }
@keyframes toast-in {
  from { opacity: 0; transform: translateY(-12px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes toast-out {
  to { opacity: 0; transform: translateY(-12px); }
}

.heatmap { display: grid; grid-template-columns: repeat(14, 1fr); gap: 4px; margin-top: 8px; }
.heatmap .cell {
  aspect-ratio: 1; border-radius: 4px; background: var(--panel-2); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 600; color: var(--text); text-align: center; line-height: 1;
  overflow: hidden; padding: 2px;
}
.heatmap .cell.l1 { background: #1e3a2f; }
.heatmap .cell.l2 { background: #2d6a4f; color: #0b1220; }
.heatmap .cell.l3 { background: #4ade80; color: #0b1220; }
.heatmap .cell.today { outline: 1px solid var(--accent); }
.heatmap .dow {
  background: transparent; border: none; color: var(--muted); font-size: 10px; font-weight: 400;
  aspect-ratio: auto; padding: 0;
}
.history-habit { margin-bottom: 22px; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.history-habit:last-child { border-bottom: none; }
.chart-wrap { margin-top: 10px; }
.chart-wrap svg { width: 100%; display: block; }
.chart-axis { fill: var(--muted); font-size: 10px; paint-order: stroke fill; stroke: var(--panel); stroke-width: 3; stroke-linejoin: round; }
.chart-bar { fill: var(--accent); }
.chart-bar.hit { fill: var(--accent-2); }
.chart-target { stroke: var(--warning); stroke-width: 1; stroke-dasharray: 4 3; }
.week-summary { display: flex; gap: 12px; margin-top: 6px; flex-wrap: wrap; }
.week-summary .wk {
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 6px;
  padding: 6px 10px; font-size: 12px;
}
.week-summary .wk.hit { border-color: var(--accent-2); }
.week-summary .wk .label { color: var(--muted); margin-right: 6px; }

/* To-Do tab */
.todo-row {
  display: grid;
  grid-template-columns: 1fr auto auto auto auto;
  gap: 10px; align-items: center;
  padding: 10px 12px;
  border: 1px solid var(--border); border-left-width: 4px;
  border-radius: 8px; margin-bottom: 8px;
  background: var(--panel-2);
}
.recur-badge {
  display: inline-block; font-size: 10px; font-weight: 600; text-transform: lowercase;
  padding: 2px 6px; border-radius: 4px; margin-left: 6px; vertical-align: middle;
  background: rgba(110, 168, 254, 0.15); color: var(--accent);
  border: 1px solid rgba(110, 168, 254, 0.35);
}
.todo-due-cell { display: flex; align-items: center; gap: 4px; }
.todo-actions { display: flex; align-items: center; gap: 4px; }
.todo-done-toggle {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 10px; border: 1px solid #86efac; border-radius: 6px;
  background: rgba(134, 239, 172, 0.08); cursor: pointer;
  font-size: 12px; color: #86efac; font-weight: 600;
  user-select: none; white-space: nowrap;
}
.todo-done-toggle:hover { background: rgba(134, 239, 172, 0.18); color: #bbf7d0; border-color: #bbf7d0; }
.todo-done-toggle input { display: none; } /* the label IS the button */
.todo-row.done .todo-done-toggle { background: #86efac; color: #0b1220; border-color: #86efac; }
.todo-row .activity { font-weight: 500; min-width: 0; }
.todo-row .activity input {
  width: 100%; background: transparent; border: 1px solid transparent; padding: 4px 6px;
  color: var(--text); font-weight: 500;
}
.todo-row .activity input:hover { border-color: var(--border); background: var(--panel); }
.todo-row .activity input:focus { background: var(--panel); border-color: var(--accent); }
/* Urgency colors on the activity text itself (conventional scheme):
   overdue = red, due within 7 days (incl today) = yellow. */
.todo-row .activity.urgency-soon input    { color: var(--warning); font-weight: 700; }
.todo-row .activity.urgency-overdue input { color: var(--danger); font-weight: 700; }
.todo-row.done .activity input { color: var(--muted) !important; font-weight: 500 !important; }
.todo-row .meta { color: var(--muted); font-size: 11px; margin-top: 2px; }
.todo-row .notes { grid-column: 1 / -1; }
.todo-row .notes textarea {
  width: 100%; resize: vertical; min-height: 28px;
  font-size: 12px; background: transparent; border: 1px solid transparent; padding: 4px 6px; color: var(--muted);
}
.todo-row .notes textarea:hover { border-color: var(--border); background: var(--panel); }
.todo-row .notes textarea:focus { background: var(--panel); border-color: var(--accent); color: var(--text); }
.todo-row input[type="date"], .todo-row select { font-size: 12px; padding: 5px 8px; }
.todo-delete {
  padding: 4px 8px; line-height: 1; font-size: 13px;
  border: 1px solid var(--danger); background: rgba(248, 113, 113, 0.12);
  color: var(--danger); border-radius: 4px;
  width: 28px; text-align: center;
}
.todo-delete:hover { background: rgba(248, 113, 113, 0.22); }

.todo-row.priority-low    { border-left-color: #4b5563; }
.todo-row.priority-medium { border-left-color: #fbbf24; }
.todo-row.priority-high   { border-left-color: var(--danger); }

/* Due within 7 days (incl today) = subtle yellow tint; overdue = subtle red tint.
   The colored text does most of the work. */
.todo-row.due-soon { background: rgba(251, 191, 36, 0.10); }
.todo-row.overdue  { background: rgba(248, 113, 113, 0.12); }

.todo-row.done { opacity: 0.6; background: var(--panel); border-left-color: var(--accent-2); }
.todo-row.done .activity input { text-decoration: line-through; color: var(--muted); }

.due-badge {
  font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em;
  padding: 2px 6px; border-radius: 4px; margin-left: 6px; vertical-align: middle;
}
.due-badge.overdue   { background: rgba(248, 113, 113, 0.15); color: var(--danger); }
.due-badge.due-today { background: rgba(251, 191, 36, 0.18); color: var(--warning); }
.due-badge.due-soon  { background: rgba(251, 191, 36, 0.15); color: var(--warning); }

/* Usage tab */
.panel.usage { line-height: 1.6; }
.panel.usage h2 { color: var(--accent); }
.panel.usage ul, .panel.usage ol { padding-left: 22px; margin: 8px 0; }
.panel.usage li { margin-bottom: 4px; }
.panel.usage code {
  background: var(--panel-2); padding: 1px 6px; border-radius: 3px; font-size: 12px;
  font-family: ui-monospace, Menlo, monospace;
}
.panel.usage em { color: var(--text); font-style: italic; }
.panel.usage strong { color: var(--text); }

/* Notifications tab */
.notif-section {
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px;
  padding: 14px 16px; margin-bottom: 12px;
}
.notif-section h3 { color: var(--text); }
.notif-section code {
  background: var(--bg); padding: 1px 6px; border-radius: 3px; font-size: 12px;
  font-family: ui-monospace, Menlo, monospace;
}

/* Login page */
.login-wrap {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.login-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 28px; width: 100%; max-width: 360px;
}
.login-card h1 { margin: 0 0 8px; font-size: 20px; }
.login-card p { margin: 0 0 20px; color: var(--muted); font-size: 13px; }
.login-card form { display: flex; flex-direction: column; gap: 10px; }
.login-card input { padding: 10px 12px; font-size: 14px; }
.login-card button { padding: 10px 12px; font-size: 14px; }

@media (max-width: 600px) {
  main { padding: 12px; }
  header { padding: 10px 12px; flex-wrap: wrap; gap: 8px; }
  header h1 { font-size: 16px; }
  header .actions { flex-wrap: wrap; gap: 6px; }
  header .actions button { padding: 6px 8px; font-size: 12px; }
  header .status { display: none; }

  nav.tabs { padding: 8px 12px 0; overflow-x: auto; flex-wrap: nowrap; white-space: nowrap; -webkit-overflow-scrolling: touch; }
  nav.tabs button { flex: 0 0 auto; }

  .panel { padding: 12px; margin-bottom: 12px; }

  /* Inputs feel right on touch: bigger tap targets, prevent iOS zoom on focus. */
  input, select, textarea, button { font-size: 16px; }
  input[type="checkbox"] { width: 22px; height: 22px; }

  /* Today: stack name above the input. */
  .habit-row { grid-template-columns: 1fr; gap: 8px; }
  .habit-row .row { flex-wrap: wrap; }
  .habit-row input[type="number"] { width: 100%; max-width: 160px; }

  /* To-Do row: stack vertically; date / priority / repeat sit in a wrap row,
     done + delete on their own row so they're never crammed off-screen. */
  .todo-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .todo-row .activity input { font-size: 15px; }
  .todo-due-cell, .todo-actions { width: 100%; flex-wrap: wrap; }
  .todo-actions { justify-content: space-between; }
  .todo-row select { flex: 1; min-width: 100px; }
  .todo-row input[type="date"] { flex: 1; }
  .todo-done-toggle { flex: 1; justify-content: center; padding: 8px 12px; font-size: 13px; }
  .todo-delete { width: 44px; height: 36px; font-size: 16px; }
  .recur-badge, .due-badge { font-size: 11px; }

  /* Expense add form + new-todo form: full-width inputs, button on its own line. */
  #tab-expenses .row, #tab-todo .row { flex-wrap: wrap; }
  #expDate, #expAmount, #expCategory, #expDesc { flex: 1 1 100%; width: 100%; min-width: 0; }
  #addExpense, #addTodo { width: 100%; }
  #newTodoActivity { flex: 1 1 100%; min-width: 0; }
  #newTodoDue { flex: 1; }

  /* Expense + manage tables: horizontal scroll instead of overlap. */
  #expenseList, #categoryAdminList, #manageList { overflow-x: auto; }
  #expenseList table, #categoryAdminList table { min-width: 480px; }
  /* Manage Habits has 7 columns (incl. action buttons) — needs more room or the
     Name column collapses to a sliver. Force the name input to a sensible width. */
  #manageList table { min-width: 720px; }
  #manageList .edit-name { min-width: 160px; }

  /* History heatmap stays 14 cols but cells get tighter. */
  .heatmap .cell { font-size: 9px; }
  .week-summary { gap: 6px; }
  .week-summary .wk { padding: 5px 8px; font-size: 11px; }
}