:root {
  --bg: #ffffff;
  --ink: #111111;
  --ink-soft: #555555;
  --ink-faint: #888888;
  --line: #e4e4e4;
  --line-strong: #cccccc;
  --surface: #fafafa;
  --accent: #111111;
  --danger: #b00020;
  --pos: #1a7f37;
  --neg: #b00020;
  --radius: 10px;
  --maxw: 880px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0e0e;
    --ink: #f2f2f2;
    --ink-soft: #b5b5b5;
    --ink-faint: #808080;
    --line: #262626;
    --line-strong: #3a3a3a;
    --surface: #171717;
    --accent: #f2f2f2;
    --pos: #4ade80;
    --neg: #f87171;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1 { font-size: 1.6rem; margin: 0; letter-spacing: -0.02em; }
h2 { font-size: 1.05rem; margin: 0; }
p { margin: 0; }

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 20;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 0.5rem; font-weight: 700; letter-spacing: -0.01em; }
.brand-mark { font-size: 0.8rem; }
.brand-name { font-size: 1.05rem; }

.tabs { display: flex; gap: 0.25rem; margin-left: auto; flex-wrap: wrap; }
.tab {
  appearance: none;
  border: 1px solid transparent;
  background: none;
  color: var(--ink-soft);
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  font-size: 0.9rem;
  cursor: pointer;
  font-family: inherit;
}
.tab:hover { color: var(--ink); }
.tab[aria-selected="true"] {
  background: var(--ink);
  color: var(--bg);
}

.ghost-btn {
  appearance: none;
  border: 1px solid var(--line-strong);
  background: none;
  color: var(--ink);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  cursor: pointer;
  font-family: inherit;
}
.ghost-btn:hover { background: var(--surface); }

/* ---------- layout ---------- */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}
.view-head { margin-bottom: 1.5rem; }
.sub { color: var(--ink-soft); margin-top: 0.35rem; font-size: 0.95rem; }
.section-title { color: var(--ink-soft); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 0.75rem; }
.empty { color: var(--ink-faint); font-size: 0.95rem; padding: 1.25rem 0; }
.muted { color: var(--ink-soft); }
.small { font-size: 0.82rem; }

/* ---------- forms ---------- */
.add-row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.add-row input[type="text"],
.add-row input[type="number"],
.add-row input[type="date"],
.add-row select {
  flex: 1 1 auto;
  min-width: 0;
}
.finance-add { align-items: stretch; }
.finance-add #txn-desc { flex: 2 1 160px; }
.finance-add #txn-amount { flex: 0 1 120px; }

input, select, textarea {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--ink);
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--ink);
  outline-offset: 0;
}

.primary-btn {
  appearance: none;
  border: none;
  background: var(--ink);
  color: var(--bg);
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
}
.primary-btn:hover { opacity: 0.85; }
.primary-btn:disabled { opacity: 0.4; cursor: default; }

/* ---------- habits ---------- */
.habit-list { display: flex; flex-direction: column; gap: 0.5rem; }
.habit {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.habit-check {
  width: 26px; height: 26px;
  border-radius: 50%;
  border: 2px solid var(--line-strong);
  background: none;
  cursor: pointer;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  color: transparent;
  font-size: 0.9rem;
  padding: 0;
}
.habit-check.done {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--bg);
}
.habit-name { font-weight: 500; flex: 1 1 auto; }
.habit-name.done { color: var(--ink-faint); }
.habit-streak {
  font-size: 0.8rem;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.habit-streak strong { color: var(--ink); }

/* ---------- goals ---------- */
.goal-list { display: flex; flex-direction: column; gap: 0.6rem; }
.goal {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  background: var(--surface);
}
.goal-top { display: flex; align-items: center; gap: 0.6rem; }
.goal-name { font-weight: 600; flex: 1 1 auto; }
.goal-name.done { text-decoration: line-through; color: var(--ink-faint); }
.goal-progress-row { display: flex; align-items: center; gap: 0.75rem; margin-top: 0.7rem; }
.goal-bar {
  flex: 1 1 auto;
  height: 8px;
  border-radius: 999px;
  background: var(--line);
  overflow: hidden;
}
.goal-bar > span { display: block; height: 100%; background: var(--ink); transition: width 0.2s; }
.goal-pct { font-size: 0.8rem; color: var(--ink-soft); width: 3ch; text-align: right; font-variant-numeric: tabular-nums; }
.goal input[type="range"] { flex: 1 1 auto; padding: 0; accent-color: var(--ink); }

/* ---------- finances ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.75rem;
}
.stat {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.stat-label { font-size: 0.78rem; color: var(--ink-soft); text-transform: uppercase; letter-spacing: 0.05em; }
.stat-value { font-size: 1.35rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat-value.pos { color: var(--pos); }
.stat-value.neg { color: var(--neg); }

.chart-wrap { margin-bottom: 1.75rem; }
#finance-chart { width: 100%; max-width: 100%; display: block; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { text-align: left; padding: 0.6rem 0.5rem; border-bottom: 1px solid var(--line); }
th { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-soft); font-weight: 600; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.amt-pos { color: var(--pos); }
.amt-neg { color: var(--neg); }

.icon-btn {
  appearance: none;
  border: none;
  background: none;
  color: var(--ink-faint);
  cursor: pointer;
  font-size: 1rem;
  padding: 0.2rem 0.4rem;
  border-radius: 6px;
  font-family: inherit;
}
.icon-btn:hover { color: var(--danger); background: var(--surface); }

/* ---------- reflect ---------- */
.reflect-controls { display: flex; align-items: center; gap: 1rem; margin-bottom: 1.25rem; flex-wrap: wrap; }
.reflect-note { color: var(--ink-soft); font-size: 0.88rem; }
.reflect-output {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem;
  background: var(--surface);
  white-space: pre-wrap;
  line-height: 1.6;
  font-size: 0.97rem;
}
.reflect-output h3 { margin: 1rem 0 0.4rem; font-size: 1rem; }
.reflect-output h3:first-child { margin-top: 0; }
.reflect-output strong { font-weight: 700; }

/* ---------- footer ---------- */
.footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
  color: var(--ink-faint);
  font-size: 0.85rem;
  border-top: 1px solid var(--line);
}
.link-btn {
  appearance: none;
  background: none;
  border: none;
  color: var(--ink-soft);
  cursor: pointer;
  font-size: 0.85rem;
  text-decoration: underline;
  text-underline-offset: 2px;
  font-family: inherit;
  padding: 0;
}
.link-btn:hover { color: var(--ink); }
.link-btn.danger:hover { color: var(--danger); }

/* ---------- modal ---------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  display: grid;
  place-items: center;
  z-index: 50;
  padding: 1rem;
}
.modal {
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  width: 100%;
  max-width: 460px;
  max-height: 90vh;
  overflow-y: auto;
}
.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid var(--line);
}
.modal-body { padding: 1.25rem; display: flex; flex-direction: column; gap: 1rem; }
.field { display: flex; flex-direction: column; gap: 0.35rem; }
.field > span:first-child { font-size: 0.82rem; font-weight: 600; color: var(--ink-soft); }
.hint { font-size: 0.78rem; color: var(--ink-faint); }
.settings-actions { display: flex; align-items: center; gap: 0.75rem; }
.saved-flag { color: var(--pos); font-size: 0.85rem; }

/* ---------- toast ---------- */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: var(--bg);
  padding: 0.65rem 1.1rem;
  border-radius: 999px;
  font-size: 0.88rem;
  z-index: 60;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

/* ---------- responsive ---------- */
@media (max-width: 560px) {
  .stat-grid { grid-template-columns: 1fr; }
  .topbar { gap: 0.5rem; }
  .tabs { order: 3; width: 100%; margin-left: 0; }
  h1 { font-size: 1.35rem; }
}