/* ============================================================================
   Personal Spending Dashboard — design tokens & component styles
   Ported from the Claude Design handoff (warm-paper / IBM Plex theme).
   Colours, type ramp and spacing mirror the prototype 1:1.
   ============================================================================ */

:root {
  /* surfaces */
  --bg:        #efece3;
  --surface:   #faf8f2;

  /* ink ramp (dark → light) */
  --ink:       #1c1a17;
  --ink-2:     #3a362f;
  --ink-3:     #4a463f;
  --muted:     #6b6660;
  --muted-2:   #7a7266;
  --muted-3:   #8a8378;
  --faint:     #9a9186;

  /* accents */
  --brand:     #a06a2c;   /* eyebrow / kicker */
  --accent:    #a83a1c;   /* active tab underline, "hot" heat cell */
  --accent-2:  #b0472a;   /* over-baseline red */
  --good:      #2f6f66;   /* under-baseline / reimbursed green */
  --invert:    #f4f1ea;   /* text on dark */

  /* hairlines */
  --line:      rgba(28,26,23,.16);
  --line-2:    rgba(28,26,23,.12);
  --line-3:    rgba(28,26,23,.08);
  --line-pill: rgba(28,26,23,.2);

  /* type */
  --sans: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}
::selection { background: #dcae5f; color: var(--ink); }

/* ---- shell -------------------------------------------------------------- */
.dash {
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  padding: 30px clamp(16px, 3.6vw, 52px) 84px;
}

/* ---- header ------------------------------------------------------------- */
.dash__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 22px 40px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 20px;
}
.eyebrow {
  font: 600 11px/1 var(--mono);
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--brand);
}
.dash__title {
  font: 600 30px/1.08 var(--sans);
  letter-spacing: -.015em;
  margin: 11px 0 0;
}
.dash__meta {
  margin-top: 9px;
  font: 400 12.5px/1.5 var(--mono);
  color: var(--muted-2);
}

.period { display: flex; flex-direction: column; align-items: flex-end; gap: 11px; }
.period__label {
  font: 500 10px/1 var(--mono);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--faint);
}
.period__pills { display: flex; gap: 5px; flex-wrap: wrap; justify-content: flex-end; }

.pill {
  appearance: none;
  cursor: pointer;
  white-space: nowrap;
  padding: 7px 12px;
  border-radius: 7px;
  font: 500 12px/1 var(--mono);
  transition: .12s;
  border: 1px solid var(--line-pill);
  background: transparent;
  color: var(--ink-3);
}
.pill:hover { border-color: var(--ink); }
.pill.is-active { border-color: var(--ink); background: var(--ink); color: var(--invert); }

/* ---- tab bar ------------------------------------------------------------ */
.tabs {
  display: flex;
  gap: 2px;
  margin-top: 22px;
  border-bottom: 1px solid var(--line-2);
  flex-wrap: wrap;
  align-items: center;
}
.tab {
  appearance: none;
  border: none;
  background: none;
  cursor: pointer;
  padding: 11px 16px;
  margin-bottom: -1px;
  font: 500 13px/1 var(--sans);
  color: var(--muted-3);
  border-bottom: 2px solid transparent;
}
.tab:hover { color: var(--ink-2); }
.tab.is-active { font-weight: 600; color: var(--ink); border-bottom-color: var(--accent); }

.tabs__spacer { flex: 1 1 auto; }

.tweaks-toggle {
  appearance: none;
  cursor: pointer;
  background: none;
  border: 1px solid var(--line-pill);
  border-radius: 7px;
  padding: 6px 11px;
  margin-bottom: 4px;
  font: 500 11.5px/1 var(--mono);
  color: var(--ink-3);
  transition: .12s;
}
.tweaks-toggle:hover { border-color: var(--ink); }
.tweaks-toggle.is-active { border-color: var(--ink); background: var(--ink); color: var(--invert); }

/* ---- tweaks panel ------------------------------------------------------- */
.tweaks {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 26px;
  margin-top: 16px;
  padding: 15px 18px;
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: 10px;
}
.tweaks[hidden] { display: none; }
.tweak {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font: 500 12px/1.3 var(--sans);
  color: var(--ink-2);
  cursor: pointer;
}
.tweak input[type="checkbox"] { width: 15px; height: 15px; accent-color: var(--accent); cursor: pointer; }
.tweak select {
  font: 500 11.5px/1 var(--mono);
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line-pill);
  border-radius: 6px;
  padding: 5px 8px;
  cursor: pointer;
}
.tweak__hint { font: 400 10.5px/1.3 var(--mono); color: var(--faint); }
.tweaks__note { flex-basis: 100%; font: 400 10.5px/1.4 var(--mono); color: var(--faint); margin: 0; }

/* ---- generic status blocks --------------------------------------------- */
.state-msg {
  padding: 80px 0;
  text-align: center;
  font: 400 13px/1.6 var(--mono);
  color: var(--muted-2);
}
.error-card {
  max-width: 520px;
  margin: 56px auto;
  padding: 26px 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
}
.error-card h2 { font: 600 15px/1.3 var(--sans); margin: 0; }
.error-card p { font: 400 12.5px/1.6 var(--sans); color: var(--muted); margin: 9px 0 16px; }
.error-card code { font-family: var(--mono); }
.file-btn {
  display: inline-block;
  cursor: pointer;
  padding: 9px 15px;
  background: var(--ink);
  color: var(--invert);
  border-radius: 7px;
  font: 500 12px/1 var(--sans);
}
.file-btn input { display: none; }

/* ---- sections ----------------------------------------------------------- */
.view[hidden] { display: none; }
.section-title { font: 600 18px/1.2 var(--sans); margin: 30px 0 4px; }
.section-note  { font: 400 12px/1.5 var(--mono); color: var(--muted-2); margin-bottom: 20px; }
.caveat {
  max-width: 820px;
  font: 400 11.5px/1.6 var(--sans);
  color: var(--muted-3);
  margin: 16px 0 0;
}

/* heatmap header row */
.hm-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 14px;
  margin: 30px 0 6px;
}
.hm-head h2 { font: 600 18px/1.2 var(--sans); margin: 0; }
.hm-head__note { font: 400 12px/1.5 var(--mono); color: var(--muted-2); margin-top: 5px; }
.hm-legend {
  display: flex;
  align-items: center;
  gap: 8px;
  font: 400 10.5px/1 var(--mono);
  color: var(--muted-2);
}
.hm-legend .sw { width: 13px; height: 13px; border-radius: 3px; }
.hm-legend .sw.s0 { background: #e4ddcd; border: 1px solid var(--line-3); }
.hm-legend .sw.s1 { background: #f2d29a; }
.hm-legend .sw.s2 { background: #e6a758; }
.hm-legend .sw.s3 { background: #d1702f; }
.hm-legend .sw.s4 { background: #a83a1c; }

.chart-host { position: relative; overflow: visible; padding: 16px 0 4px; }

/* categories layout */
.cat-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(240px, 1fr);
  gap: 36px;
  align-items: start;
}
@media (max-width: 720px) { .cat-grid { grid-template-columns: 1fr; } }
.cat-aside__label {
  font: 500 10px/1 var(--mono);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 6px;
}
.fb-block { margin-top: 36px; padding-top: 24px; border-top: 1px solid var(--line-2); }
.fb-block h3 { font: 600 15px/1.2 var(--sans); margin: 0 0 4px; }
.fb-block__intro { font: 400 12px/1.55 var(--sans); color: var(--muted); max-width: 640px; margin-bottom: 16px; }

/* ---- card grids --------------------------------------------------------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
  margin-bottom: 32px;
}
.stat {
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: 9px;
  padding: 16px 17px;
}
.stat__label {
  font: 500 10px/1.2 var(--mono);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--faint);
}
.stat__value {
  font: 600 21px/1.1 var(--mono);
  letter-spacing: -.01em;
  margin-top: 9px;
}
.stat__sub { font: 400 10.5px/1.3 var(--mono); margin-top: 6px; }

.trend-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 16px;
  margin-top: 26px;
}
.tcard {
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: 9px;
  padding: 15px 17px;
}
.tcard__top { display: flex; justify-content: space-between; align-items: baseline; }
.tcard__month { font: 600 13px/1 var(--sans); }
.tcard__tag { font: 500 9.5px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.tcard__line { font: 400 11.5px/1.9 var(--mono); color: var(--ink-3); white-space: pre-wrap; }
.tcard__line:first-of-type { margin-top: 9px; }

/* ---- heatmap tooltip (rendered by D3) ----------------------------------- */
.hm-tip {
  position: absolute;
  pointer-events: none;
  z-index: 20;
  background: var(--ink);
  color: var(--invert);
  padding: 9px 11px;
  border-radius: 6px;
  font: 400 11.5px/1.45 var(--mono);
  box-shadow: 0 6px 22px rgba(0,0,0,.28);
  opacity: 0;
  transition: opacity .09s;
  white-space: nowrap;
  max-width: 260px;
}
.hm-tip b { color: #e9c579; font-weight: 600; }

@keyframes fadeUp { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }