:root {
  --bg: #0f1115;
  --surface: #1a1d24;
  --surface-2: #232730;
  --border: #2c313c;
  --text: #e8ecf2;
  --text-dim: #8b94a3;
  --accent: #f97316;
  --accent-dim: #c2410c;
  --good: #22c55e;
  --good-dim: #15803d;
  --bad: #ef4444;
  --bad-dim: #991b1b;
  --radius: 12px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { margin: 0 0 0.5rem; font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: 1.8rem; }
h2 { font-size: 1.2rem; margin-top: 1.5rem; }

.muted { color: var(--text-dim); }

/* nav */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; font-size: 1.1rem; color: var(--text); }
.brand:hover { text-decoration: none; }
.nav-links { display: flex; gap: 1.25rem; }
.nav-links a { color: var(--text-dim); font-size: 0.95rem; }
.nav-links a:hover { color: var(--text); text-decoration: none; }

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* flash */
.flash {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  border: 1px solid;
}
.flash-error { background: rgba(239, 68, 68, 0.1); border-color: var(--bad); color: #fca5a5; }
.flash-success { background: rgba(34, 197, 94, 0.1); border-color: var(--good); color: #86efac; }

/* hero / today */
.hero {
  text-align: center;
  padding: 2rem 1rem 1.5rem;
}
.date-label {
  color: var(--text-dim);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}
.hero h1 { font-size: 2rem; margin-bottom: 1.5rem; }

/* date navigation (Today page) */
.date-nav {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin: -0.75rem 0 0.5rem;
}
.date-pick { margin: 0; }
.date-pick input[type=date] {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.5rem 0.7rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
}
.date-pick input[type=date]:focus { outline: none; border-color: var(--accent); }
.date-pick input[type=date]::-webkit-calendar-picker-indicator { filter: invert(0.7); cursor: pointer; }
.btn.disabled {
  opacity: 0.35;
  cursor: default;
  pointer-events: none;
}
.btn-today { border-color: var(--accent); color: var(--accent); }
.btn-today:hover { background: var(--accent); color: #fff; text-decoration: none; }
.backfill-note { font-size: 0.85rem; margin: 0.25rem 0 0; }

.checkin-form {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  padding: 0.9rem 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.05s, background 0.15s, border-color 0.15s;
}
.btn:hover { background: var(--surface-2); }
.btn:active { transform: scale(0.98); }

.btn-yes { border-color: var(--good-dim); }
.btn-yes.selected, .btn-yes:hover { background: var(--good-dim); border-color: var(--good); color: #fff; }
.btn-no { border-color: var(--bad-dim); }
.btn-no.selected, .btn-no:hover { background: var(--bad-dim); border-color: var(--bad); color: #fff; }

.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dim); }
.btn-link {
  background: transparent;
  border: none;
  color: var(--accent);
  padding: 0.25rem 0.5rem;
  font-size: 0.9rem;
}
.btn-link:hover { background: transparent; text-decoration: underline; }
.btn-link.danger { color: var(--bad); }

.result-line {
  margin-top: 1.25rem;
  font-size: 0.95rem;
}
.result-line.earned { color: var(--good); }
.result-line.broke { color: var(--bad); }

/* habit cards (home) */
.habit-card { margin-top: 1rem; text-align: center; }
.habit-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
  text-align: left;
}
.habit-head h2 { margin: 0; font-size: 1.25rem; }
.habit-meta { display: flex; gap: 0.4rem; align-items: center; }
.streak-pill {
  font-size: 0.85rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-dim);
  white-space: nowrap;
}
.habit-stakes { font-size: 0.85rem; margin: 0.4rem 0 1rem; text-align: left; }
.habit-card .checkin-form { margin-bottom: 0.25rem; }
.habit-settings { margin-top: 0.75rem; text-align: left; }
.habit-settings summary {
  cursor: pointer;
  color: var(--text-dim);
  font-size: 0.85rem;
  user-select: none;
}
.habit-settings summary:hover { color: var(--text); }
.habit-settings[open] summary { margin-bottom: 0.6rem; color: var(--text); }

/* grid cards */
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.card-wide { grid-column: span 2; }
.card-label {
  color: var(--text-dim);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.35rem;
}
.card-value {
  font-size: 1.6rem;
  font-weight: 600;
}
.card-value.muted { color: var(--text-dim); font-size: 1.1rem; }
.card-unit { font-size: 1rem; color: var(--text-dim); font-weight: 400; }

/* progress */
.progress {
  height: 10px;
  background: var(--surface-2);
  border-radius: 999px;
  overflow: hidden;
  margin: 0.75rem 0 0.5rem;
}
.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #fb923c);
  border-radius: 999px;
  transition: width 0.4s ease;
}
.progress-text {
  font-size: 0.9rem;
  color: var(--text-dim);
}

/* goals page */
.new-goal h2 { margin-top: 0; }
.row-form {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.row-form input[type=text] { flex: 2 1 200px; }
.row-form input[type=number] { flex: 1 1 100px; max-width: 140px; }

input[type=text], input[type=number], input[type=password] {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
}
input:focus {
  outline: none;
  border-color: var(--accent);
}

.goal-card { margin-top: 1rem; }
.goal-card.done { opacity: 0.6; }
.goal-card.active { border-color: var(--accent); }
.goal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.goal-head h3 { margin: 0; }
.goal-tags { display: flex; gap: 0.35rem; }
.tag {
  font-size: 0.75rem;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.tag-active { background: var(--accent); color: #fff; }
.tag-done { background: var(--good-dim); color: #fff; }

.goal-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}
.goal-actions form { display: inline-flex; gap: 0.35rem; align-items: center; }
.spend-form input { padding: 0.4rem 0.6rem; font-size: 0.9rem; }
.spend-form input[name=amount_dollars] { width: 90px; }
.spend-form input[name=note] { width: 140px; }

/* trends */
.trends-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.btn-sm { padding: 0.5rem 0.9rem; font-size: 0.9rem; }
.card-value.negative { color: var(--bad); }
.stats-grid { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }

.trend-chart {
  width: 100%;
  height: 170px;
  margin-top: 1rem;
  display: block;
}
.chart-line { stroke: var(--accent); stroke-width: 2; vector-effect: non-scaling-stroke; }
.chart-zero { stroke: var(--border); stroke-width: 1; stroke-dasharray: 4 4; vector-effect: non-scaling-stroke; }
.chart-dot { fill: var(--accent); }
.chart-axis {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 0.25rem;
}

.table-wrap { overflow-x: auto; }
.ledger .ctr { text-align: center; }
.mark { font-weight: 700; }
.mark.good { color: var(--good); }
.mark.bad { color: var(--bad); }

/* history tables */
.ledger { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.ledger th, .ledger td {
  padding: 0.55rem 0.5rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.ledger th { color: var(--text-dim); font-weight: 500; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; }
.ledger tr:last-child td { border-bottom: none; }
.ledger .num { text-align: right; font-variant-numeric: tabular-nums; }
.ledger .negative { color: var(--bad); }
.badge {
  font-size: 0.8rem;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
}
.badge-yes { background: var(--good-dim); color: #fff; }
.badge-no { background: var(--bad-dim); color: #fff; }

/* login */
.login-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 70vh;
}
.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  width: 100%;
  max-width: 360px;
  text-align: center;
}
.login-card h1 { margin-bottom: 1.25rem; }
.login-card form { display: flex; flex-direction: column; gap: 0.75rem; }
.login-card input { text-align: center; }

/* settings (collapsed details on home) */
.settings-card { margin-top: 1rem; }
.settings-card details summary {
  cursor: pointer;
  color: var(--text-dim);
  font-size: 0.9rem;
  user-select: none;
}
.settings-card details summary:hover { color: var(--text); }
.settings-card details[open] summary { margin-bottom: 0.75rem; color: var(--text); }
.settings-label {
  align-self: center;
  color: var(--text-dim);
  font-size: 0.9rem;
}
.settings-note { font-size: 0.85rem; margin: 0.6rem 0 0; }

/* mobile */
@media (max-width: 540px) {
  .grid { grid-template-columns: 1fr; }
  .card-wide { grid-column: span 1; }
  .nav { padding: 0.75rem 1rem; }
  .nav-links { gap: 0.85rem; }
  .container { padding: 1rem; }
  .hero h1 { font-size: 1.5rem; }
  .btn { padding: 0.85rem 1.2rem; }
  .ledger { font-size: 0.85rem; }
}