/* ============================================================================
   Financials — design system
   ----------------------------------------------------------------------------
   Hand-authored, no build step. Replaces Bootstrap 5.

   Two token sets: light is the default, dark activates on the OS preference.
   Everything below the token block consumes tokens only — no literal colours in
   component rules, so a theme change is a token edit.

   NOTE: `.text-danger` / `.text-success` (bottom of this file) are load-bearing
   NAMES, not styling conveniences. app/routes.py:261 emits them as strings into
   the /api/transactions JSON payload and the infinite-scroll script applies them
   verbatim to appended rows. Renaming them here silently breaks the colour of
   every lazy-loaded transaction. See the work unit's proposal.
   ========================================================================== */

:root {
  /* Surfaces ------------------------------------------------------------- */
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #f2f4f7;
  --surface-3: #eaecf0;
  --border: #e4e7ec;
  --border-strong: #d0d5dd;

  /* Text ----------------------------------------------------------------- */
  --text: #101828;
  /* Two text tiers only. A third, lighter tier was tried (#98a2b3) and removed:
     small text on --surface-2 needs >=4.5:1 for WCAG AA, and at that background
     nothing lighter than --text-muted clears it — so a "subtle" tier could only
     have existed by failing contrast. Bootstrap's .text-muted, which this
     replaced, measured 4.69:1; the discarded token measured 2.34:1. */
  --text-muted: #667085;

  /* Accents -------------------------------------------------------------- */
  --accent: #2563eb;
  --accent-text: #1d4ed8;
  --accent-bg: #eff4ff;
  --accent-border: #c7d7fe;

  /* Semantic ------------------------------------------------------------- */
  --pos: #067647;
  --pos-bg: #ecfdf3;
  --pos-border: #abefc6;
  --neg: #b42318;
  --neg-bg: #fef3f2;
  --neg-border: #fecdca;
  --warn: #93370d;
  --warn-bg: #fffaeb;
  --warn-border: #fedf89;

  /* Type scale ----------------------------------------------------------- */
  --fs-xs: 0.75rem;
  --fs-sm: 0.8125rem;
  --fs-base: 0.9375rem;
  --fs-md: 1.0625rem;
  --fs-lg: 1.375rem;
  --fs-xl: 1.875rem;

  /* Spacing -------------------------------------------------------------- */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.5rem;
  --sp-6: 2rem;

  /* Radii + shadow ------------------------------------------------------- */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-pill: 999px;
  --shadow-sm: 0 1px 2px rgb(16 24 40 / 0.05);

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
          Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c0e12;
    --surface: #14171c;
    --surface-2: #1a1e25;
    --surface-3: #232830;
    --border: #23272f;
    --border-strong: #333944;

    --text: #edeff2;
    --text-muted: #98a2b3;

    --accent: #5b8def;
    --accent-text: #84adf7;
    --accent-bg: #131c2e;
    --accent-border: #23375c;

    --pos: #47c97e;
    --pos-bg: #0d1f16;
    --pos-border: #1d4430;
    --neg: #f97066;
    --neg-bg: #24110f;
    --neg-border: #55211d;
    --warn: #f2b23c;
    --warn-bg: #241a09;
    --warn-border: #4d3a12;

    --shadow-sm: 0 1px 2px rgb(0 0 0 / 0.40);
  }
}

/* ── Reset / base ─────────────────────────────────────────────────────────── */

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-base);
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 600; line-height: 1.3; }
p { margin: 0; }
a { color: var(--accent-text); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

/* ── Layout ───────────────────────────────────────────────────────────────── */

.page { padding: var(--sp-5) var(--sp-5) var(--sp-6); max-width: 1600px; margin: 0 auto; }
@media (max-width: 640px) { .page { padding: var(--sp-4) var(--sp-3) var(--sp-5); } }

.stack   { display: flex; flex-direction: column; }
.row     { display: flex; align-items: center; }
.row-b   { display: flex; align-items: baseline; }
.between { justify-content: space-between; }
.wrap    { flex-wrap: wrap; }
.grow    { flex: 1 1 auto; min-width: 0; }
.gap-1 { gap: var(--sp-1); } .gap-2 { gap: var(--sp-2); }
.gap-3 { gap: var(--sp-3); }
.mb-2 { margin-bottom: var(--sp-2); } .mb-3 { margin-bottom: var(--sp-3); }
.mb-4 { margin-bottom: var(--sp-4); } .mb-5 { margin-bottom: var(--sp-5); }
.mt-1 { margin-top: var(--sp-1); }

/* ── Navbar ───────────────────────────────────────────────────────────────── */
/* No collapse/hamburger: the previous navbar had none to inherit, and at this
   link count wrapping beats a disclosure widget. Links stay reachable at 320px. */

.nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-4);
  padding: var(--sp-3) var(--sp-5);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.nav-brand {
  font-weight: 700;
  font-size: var(--fs-md);
  color: var(--text);
  letter-spacing: -0.01em;
  margin-right: var(--sp-2);
}
.nav-brand:hover { text-decoration: none; }
.nav-links { display: flex; align-items: center; gap: var(--sp-1); flex-wrap: wrap; }
.nav-link {
  color: var(--text-muted);
  font-size: var(--fs-sm);
  font-weight: 500;
  padding: var(--sp-1) var(--sp-2);
  border-radius: var(--r-sm);
}
.nav-link:hover { color: var(--text); background: var(--surface-2); text-decoration: none; }
.nav-link.is-active { color: var(--text); background: var(--surface-2); }
.nav-right { display: flex; align-items: center; gap: var(--sp-2); margin-left: auto; }
.nav-icon { font-size: var(--fs-md); color: var(--text-muted); line-height: 1; }
.nav-icon:hover { color: var(--text); text-decoration: none; }
@media (max-width: 640px) {
  .nav { padding: var(--sp-3); }
  .nav-right { margin-left: 0; width: 100%; }
  .nav-status { display: none; }
}

/* ── Cards ────────────────────────────────────────────────────────────────── */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.card-body { padding: var(--sp-5); }
@media (max-width: 640px) { .card-body { padding: var(--sp-4); } }
.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-5);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  font-size: var(--fs-sm);
}

/* Section label — the small tracked-caps heading above a data block. */
.eyebrow {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ── Typography helpers ───────────────────────────────────────────────────── */

.muted   { color: var(--text-muted); }
.small   { font-size: var(--fs-sm); }
.xs      { font-size: var(--fs-xs); }
.strong  { font-weight: 600; }
.medium  { font-weight: 500; }
.nowrap  { white-space: nowrap; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cap     { text-transform: capitalize; }
.right   { text-align: right; }
.center  { text-align: center; }

/* Money. Tabular figures keep columns of amounts aligned on the decimal —
   the single highest-value typographic choice in a finance UI. */
.amount { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }
.amount-xl { font-size: var(--fs-xl); font-weight: 650; letter-spacing: -0.02em; }
.amount-lg { font-size: var(--fs-lg); font-weight: 600; letter-spacing: -0.01em; }

/* ── Buttons ──────────────────────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 0.4375rem var(--sp-3);
  font-family: inherit;
  font-size: var(--fs-sm);
  font-weight: 500;
  line-height: 1.2;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.12s ease, border-color 0.12s ease;
}
.btn:hover { background: var(--surface-2); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-sm { padding: 0.25rem var(--sp-2); font-size: var(--fs-xs); }
.btn-block { width: 100%; }

.btn-primary {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-text); border-color: var(--accent-text); }

.btn-danger { color: var(--neg); border-color: var(--neg-border); background: var(--neg-bg); }
.btn-danger:hover { background: var(--neg-border); }

.btn-warn { color: var(--warn); background: var(--warn-bg); border-color: var(--warn-border); }
.btn-warn:hover { background: var(--warn-border); }

.btn-accent { color: var(--accent-text); background: var(--accent-bg); border-color: var(--accent-border); }
.btn-accent:hover { background: var(--accent-border); }

.btn-ghost { border-color: transparent; background: transparent; color: var(--text-muted); }
.btn-ghost:hover { background: var(--surface-2); color: var(--text); }

/* ── Badges ───────────────────────────────────────────────────────────────── */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.125rem var(--sp-2);
  font-size: var(--fs-xs);
  font-weight: 500;
  line-height: 1.5;
  border-radius: var(--r-pill);
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-muted);
  white-space: nowrap;
}
.badge-accent  { background: var(--accent-bg); color: var(--accent-text); border-color: var(--accent-border); }
.badge-success { background: var(--pos-bg);    color: var(--pos);         border-color: var(--pos-border); }
.badge-danger  { background: var(--neg-bg);    color: var(--neg);         border-color: var(--neg-border); }
.badge-warn    { background: var(--warn-bg);   color: var(--warn);        border-color: var(--warn-border); }
/* Neutral is the default (.badge alone) — used for lapsed/inactive states,
   which must read as "not applicable", never as "overdue". See knowledge 005. */

/* ── Alerts ───────────────────────────────────────────────────────────────── */

.alert {
  padding: var(--sp-3) var(--sp-5);
  font-size: var(--fs-sm);
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
}
.alert-warn   { background: var(--warn-bg); border-bottom-color: var(--warn-border); color: var(--warn); }
.alert-danger { background: var(--neg-bg);  border-color: var(--neg-border); color: var(--neg);
                border-radius: var(--r-sm); border-width: 1px; border-style: solid; }

/* ── Forms ────────────────────────────────────────────────────────────────── */

.field, .select {
  padding: 0.4375rem var(--sp-3);
  font-family: inherit;
  font-size: var(--fs-sm);
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  line-height: 1.2;
}
.field::placeholder { color: var(--text-muted); }
.field:focus, .select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-bg); }
.select {
  appearance: none;
  padding-right: var(--sp-6);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='none' stroke='%23667085' stroke-width='1.5' d='M3 4.5 6 7.5 9 4.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--sp-2) center;
}
.field-auto { width: auto; }

/* ── Tables ───────────────────────────────────────────────────────────────── */

.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); }
.table th {
  padding: var(--sp-2) var(--sp-4);
  text-align: left;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.table td {
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover { background: var(--surface-2); }
.table-compact td { padding: var(--sp-2) var(--sp-4); }

/* `.table th` sets text-align:left at specificity (0,1,1), which silently beats
   a bare `.right` (0,1,0) — so a right-aligned numeric header needs the element
   in the selector or the header drifts out of line with its column. */
.table th.right { text-align: right; }
.table td.center, .table th.center { text-align: center; }
.table td.empty { padding: var(--sp-6) var(--sp-4); }

/* Week/section divider row inside the transactions table. */
.table tr.section > td {
  padding: var(--sp-2) var(--sp-4);
  background: var(--surface-2);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.table tr.section:hover > td { background: var(--surface-2); }

.empty { padding: var(--sp-6) var(--sp-4); text-align: center; color: var(--text-muted); }

/* Lapsed rows. Dimming is semantic — it means the stream stopped, not that it
   is merely low-priority (knowledge 005). Kept above 0.5 so the row stays
   readable rather than becoming decoration. */
.is-lapsed { opacity: 0.55; }

/* ── List (settings institutions) ─────────────────────────────────────────── */

.list-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-wrap: wrap;
  padding: var(--sp-3) var(--sp-5);
  border-bottom: 1px solid var(--border);
}
.list-item:last-child { border-bottom: none; }

/* ── Progress ─────────────────────────────────────────────────────────────── */

.progress {
  height: 5px;
  background: var(--surface-3);
  border-radius: var(--r-pill);
  overflow: hidden;
}
.progress > span { display: block; height: 100%; border-radius: var(--r-pill); background: var(--accent); }
.progress > span.is-over { background: var(--neg); }
.progress > span.is-near { background: var(--warn); }
.progress > span.is-ok   { background: var(--pos); }

/* ── Tiles (weekly budget grid) ───────────────────────────────────────────── */

.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: var(--sp-2);
}
.tile {
  padding: var(--sp-3);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface);
  cursor: pointer;
  transition: border-color 0.12s ease, background 0.12s ease;
}
.tile:hover { border-color: var(--border-strong); }
.tile.is-current { border-color: var(--accent-border); background: var(--accent-bg); }
.tile.is-selected { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }

/* ── Account strip ────────────────────────────────────────────────────────── */

.strip { display: flex; gap: var(--sp-3); overflow-x: auto; padding-bottom: var(--sp-2); }
.acct {
  flex: 0 0 auto;
  min-width: 232px;
  padding: var(--sp-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-sm);
}
/* Sub-rows on an account card (liability, vested/unvested). Each is rendered
   ONLY when its data is non-null — a null means "not applicable", never zero.
   See knowledge 021: a $0.00 vested row asserts nothing has vested. */
.acct-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-2);
  font-size: var(--fs-sm);
}
.acct-divider { margin-top: var(--sp-2); padding-top: var(--sp-2); border-top: 1px solid var(--border); }

/* ── Chart ────────────────────────────────────────────────────────────────── */

.chart { display: flex; align-items: flex-end; gap: 2px; height: 110px; }
.chart-col {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  height: 100%;
  cursor: pointer;
  border-radius: var(--r-sm) var(--r-sm) 0 0;
}
.chart-col:hover { background: var(--surface-2); }
.chart-col.is-selected { background: var(--accent-bg); }
.chart-bar { background: var(--accent); border-radius: 3px 3px 0 0; opacity: 0.85; }
.chart-col:hover .chart-bar { opacity: 1; }

/* ── Semantic colour utilities ────────────────────────────────────────────── */
/* `.text-danger` and `.text-success` are emitted by app/routes.py:261 into the
   /api/transactions payload. Do not rename. */

.text-danger  { color: var(--neg); }
.text-success { color: var(--pos); }
.text-warn    { color: var(--warn); }

/* ── Login ────────────────────────────────────────────────────────────────── */

.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  padding: var(--sp-4);
}
.login-card { width: 100%; max-width: 21rem; }