:root {
  --paper: #ECEEE3;
  --paper-light: #F7F8F1;
  --ink: #1F2E22;
  --ink-soft: #6B7A67;
  --line: #d9dbcf;
  --credit: #3F6B4A;
  --credit-bg: #E4EADE;
  --debit: #B23A50;
  --debit-bg: #F3E1E3;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'IBM Plex Sans', ui-sans-serif, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

input, button { font-family: inherit; color: inherit; }
button { -webkit-tap-highlight-color: transparent; }

.font-mono, .wordmark, .stamp, .stamp-sm, .eyebrow, .restart-eyebrow,
.stat-label, .field-label, .strategy-name, .tab-btn span, .btn-primary, .btn-ghost {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
}

a:focus-visible, button:focus-visible, input:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--credit);
  outline-offset: 2px;
}

/* ---------- Layout shell ---------- */
.app-shell {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  position: relative;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 18px 20px 14px;
  background: var(--paper);
  border-bottom: 1px dashed var(--line);
}
.wordmark {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.14em;
}
.topbar-date {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--ink-soft);
}

.view-container {
  flex: 1;
  padding: 20px 20px 100px;
}
.view[hidden] { display: none; }

.view-title { font-size: 20px; font-weight: 600; margin: 0 0 4px; line-height: 1.3; }
.view-sub { font-size: 13px; color: var(--ink-soft); margin: 0 0 20px; line-height: 1.5; }

/* ---------- Tab bar ---------- */
.tabbar {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 480px;
  display: flex;
  background: var(--paper-light);
  border-top: 1px solid var(--line);
  padding: 8px 4px calc(8px + env(safe-area-inset-bottom, 0px));
  z-index: 20;
}
.tab-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  background: none;
  border: none;
  color: var(--ink-soft);
  font-size: 10px;
  letter-spacing: 0.02em;
  padding: 6px 2px;
  cursor: pointer;
}
.tab-btn svg { width: 20px; height: 20px; }
.tab-btn.active { color: var(--credit); }
.tab-btn-primary svg {
  background: var(--credit);
  color: var(--paper-light);
  border-radius: 50%;
  padding: 6px;
  width: 32px;
  height: 32px;
  box-sizing: content-box;
}
.tab-btn-primary.active svg { background: var(--ink); }

/* ---------- Buttons ---------- */
.btn-primary {
  background: var(--credit);
  color: var(--paper-light);
  border: none;
  font-weight: 600;
  letter-spacing: 0.02em;
  font-size: 14px;
  padding: 13px 20px;
  cursor: pointer;
  transition: opacity .15s ease;
}
.btn-primary:hover { opacity: .92; }
.btn-primary:disabled { opacity: .4; cursor: not-allowed; }

.btn-ghost {
  background: transparent;
  border: 1px solid var(--ink-soft);
  color: var(--ink);
  font-size: 13px;
  padding: 12px 20px;
  cursor: pointer;
}
.btn-ghost.btn-danger { border-color: var(--debit); color: var(--debit); }

.btn-block { width: 100%; display: block; margin-top: 10px; }

/* ---------- Eyebrow / stamp ---------- */
.eyebrow, .restart-eyebrow {
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--ink-soft);
  margin: 0 0 8px;
}

.stamp {
  display: inline-block;
  border: 3px solid var(--credit);
  border-radius: 8px;
  padding: 12px 22px;
  transform: rotate(-3deg);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: .02em;
  color: var(--credit);
  text-transform: uppercase;
  position: relative;
  margin: 4px 0 22px;
}
.stamp::after {
  content: '';
  position: absolute;
  inset: 4px;
  border: 1px solid var(--credit);
  border-radius: 4px;
}
.stamp.stamp-warn { border-color: var(--debit); color: var(--debit); }
.stamp.stamp-warn::after { border-color: var(--debit); }

.stamp-sm {
  display: inline-block;
  border: 2px solid var(--credit);
  border-radius: 6px;
  padding: 6px 14px;
  transform: rotate(-3deg);
  font-weight: 700;
  font-size: 12px;
  color: var(--credit);
  margin: 0 0 12px;
}

/* ---------- Dashboard ---------- */
.empty-state, .restart-card { text-align: left; }
.empty-title { font-size: 17px; font-weight: 600; margin: 0 0 4px; }
.empty-sub { font-size: 13px; color: var(--ink-soft); margin: 0 0 16px; }

.restart-card {
  background: var(--paper-light);
  border: 1px dashed var(--ink-soft);
  padding: 18px;
  margin-bottom: 22px;
}
.restart-card h2 { font-size: 17px; margin: 0 0 8px; line-height: 1.35; }
.restart-sub { font-size: 13px; color: var(--ink-soft); margin: 0 0 14px; line-height: 1.5; }

.stat-row { display: flex; flex-wrap: wrap; gap: 14px 20px; margin-bottom: 14px; }
.pace-note { font-size: 12px; color: var(--ink-soft); margin: -12px 0 18px; line-height: 1.5; }
.stat { display: flex; flex-direction: column; gap: 3px; }
.stat-label { font-size: 10px; letter-spacing: .06em; color: var(--ink-soft); }
.stat-value { font-family: 'IBM Plex Mono', monospace; font-size: 18px; font-weight: 600; }
.stat-value-credit { color: var(--credit); }

.progress-track {
  height: 6px;
  background: var(--line);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 18px;
}
.progress-fill { height: 100%; background: var(--credit); width: 0%; transition: width .3s ease; }

.milestone-card {
  background: var(--credit-bg);
  border: 1px dashed var(--credit);
  padding: 14px 16px;
  margin-bottom: 20px;
}
.milestone-card .eyebrow { margin-bottom: 4px; color: var(--credit); }
.milestone-text { font-size: 14px; font-weight: 600; margin: 0; line-height: 1.4; }

.mini-chart-wrap { margin-bottom: 20px; }
.mini-chart-wrap svg { width: 100%; height: 60px; display: block; }

.checkin-count { text-align: center; font-size: 12px; color: var(--ink-soft); margin: 10px 0 0; }

/* ---------- Debts ---------- */
.debt-list { display: flex; flex-direction: column; gap: 14px; margin-bottom: 14px; }
.debt-row {
  border: 1px solid var(--line);
  background: var(--paper-light);
  padding: 12px;
  position: relative;
}
.debt-name {
  width: calc(100% - 30px);
  border: none;
  background: transparent;
  font-size: 14px;
  font-weight: 600;
  padding: 2px 0 8px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 10px;
}
.debt-row-fields { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
.debt-mini-label {
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: 10px;
  letter-spacing: .04em;
  color: var(--ink-soft);
}
.debt-input {
  border: none;
  border-bottom: 1px solid var(--line);
  background: transparent;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  padding: 3px 0;
  width: 100%;
}
.debt-input:focus, .debt-name:focus { outline: none; border-bottom-color: var(--credit); }
.remove-debt-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  border: none;
  background: none;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  padding: 4px;
}
.remove-debt-btn:hover { color: var(--debit); }
.empty-inline { font-size: 13px; color: var(--ink-soft); margin: 4px 0 14px; }

.divider-dashed { border-top: 1px dashed var(--line); margin: 22px 0; }

.field-label { display: block; font-size: 11px; letter-spacing: .06em; color: var(--ink-soft); margin: 0 0 8px; }
.helper-text { font-size: 12px; color: var(--ink-soft); margin: 6px 0 0; line-height: 1.5; }

.slider-row { display: flex; align-items: center; gap: 12px; }
.slider-row input[type=range] { flex: 1; accent-color: var(--credit); }
.slider-value { font-family: 'IBM Plex Mono', monospace; font-weight: 600; color: var(--credit); font-size: 14px; min-width: 48px; text-align: right; }

.strategy-options { display: flex; flex-direction: column; gap: 8px; margin-bottom: 4px; }
.strategy-btn {
  display: flex;
  align-items: baseline;
  gap: 8px;
  text-align: left;
  background: var(--paper-light);
  border: 1px solid var(--line);
  padding: 10px 12px;
  cursor: pointer;
}
.strategy-btn.active { border-color: var(--credit); }
.strategy-name { font-size: 12px; font-weight: 600; color: var(--ink-soft); }
.strategy-btn.active .strategy-name { color: var(--credit); }
.strategy-desc { font-size: 12px; color: var(--ink-soft); }

.autosave-note { font-size: 11px; color: var(--ink-soft); text-align: center; margin: 18px 0 0; }

/* ---------- Check-in ---------- */
.text-input {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--paper-light);
  padding: 11px 12px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 14px;
  margin-bottom: 18px;
}
.text-input:focus { outline: none; border-color: var(--credit); }

.confirm-card {
  margin-top: 20px;
  padding: 18px;
  background: var(--credit-bg);
  border: 1px solid var(--credit);
  text-align: center;
}
.confirm-card p:not(.stamp-sm) { font-size: 14px; line-height: 1.5; margin: 0 0 16px; }

/* ---------- Progress ---------- */
.chart-card {
  background: var(--paper-light);
  border: 1px solid var(--line);
  padding: 14px;
  margin-bottom: 18px;
}
.chart-card svg { width: 100%; height: 140px; display: block; }
.chart-empty-text { font-size: 12px; fill: var(--ink-soft); font-family: 'IBM Plex Sans', sans-serif; }

.section-heading { font-size: 14px; font-weight: 600; margin: 24px 0 10px; }

.payoff-order-list { display: flex; flex-direction: column; }
.payoff-row {
  display: grid;
  grid-template-columns: 20px 1fr auto;
  gap: 10px;
  align-items: baseline;
  padding: 9px 0;
  border-bottom: 1px dotted var(--line);
  font-size: 13px;
}
.payoff-rank { font-family: 'IBM Plex Mono', monospace; color: var(--ink-soft); font-size: 12px; }
.payoff-name { font-weight: 600; }
.payoff-time { font-family: 'IBM Plex Mono', monospace; color: var(--ink-soft); font-size: 12px; text-align: right; white-space: nowrap; }

.history-list { display: flex; flex-direction: column; }
.history-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px dotted var(--line);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
}
.history-date { color: var(--ink-soft); font-size: 12px; }
.history-label { color: var(--ink-soft); font-size: 12px; font-family: 'IBM Plex Sans', sans-serif; }
.history-amount { font-weight: 600; text-align: right; white-space: nowrap; }
.history-amount-credit { color: var(--credit); }
.history-amount-neutral { color: var(--ink-soft); font-weight: 500; }

/* ---------- Settings ---------- */
.setting-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; padding: 4px 0 18px; }
.setting-name { font-size: 14px; font-weight: 600; margin: 0 0 4px; }
.setting-desc { font-size: 12px; color: var(--ink-soft); margin: 0; line-height: 1.5; }

.toggle {
  width: 44px;
  height: 26px;
  border-radius: 999px;
  background: var(--ink-soft);
  border: none;
  position: relative;
  cursor: pointer;
  flex-shrink: 0;
  padding: 0;
  transition: background .15s ease;
}
.toggle.on { background: var(--credit); }
.toggle-knob {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--paper-light);
  transition: transform .15s ease;
}
.toggle.on .toggle-knob { transform: translateX(18px); }

.privacy-note { font-size: 12px; color: var(--ink-soft); margin-top: 20px; line-height: 1.5; }

@media (prefers-reduced-motion: reduce) {
  .progress-fill, .toggle, .toggle-knob, .btn-primary { transition: none; }
}