/* ------------------------------------------------------------------
   finance.css — dark terminal theme for the Finance section.
   Scoped to body[data-section="finance"]. Dark green base, #22c55e accent.
   ------------------------------------------------------------------ */

/* ── Tokens ──────────────────────────────────────────────────────── */

body[data-section="finance"] {
  --bg:              #080f0b;
  --bg-card:         #0f1a12;
  --bg-card-hero:    #132118;
  --border:          #1a2e1e;
  --border-hover:    #254030;
  --text-primary:    #d4edd8;
  --text-secondary:  #7a9c7e;
  --text-tertiary:   #445e49;
  --accent:          #22c55e;
  --accent-dim:      #155c2f;
  --positive:        #4ade80;
  --negative:        #f87171;
  --neutral:         #7a9c7e;
  --font-mono:       "JetBrains Mono", "Fira Code", "Cascadia Code", ui-monospace, monospace;

  color-scheme: dark;
  background-image:
    radial-gradient(1200px 600px at 75% -10%, rgba(34,197,94,0.045), transparent 60%),
    linear-gradient(to right, rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-color: var(--bg);
  background-size: auto, 24px 24px, 24px 24px;
  background-attachment: fixed;
  color: var(--text-primary);
}

/* ── Chrome overrides ────────────────────────────────────────────── */

body[data-section="finance"] .site-header {
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  border-bottom-color: var(--border);
  backdrop-filter: blur(12px);
}

body[data-section="finance"] .site-nav__link[aria-current="page"] {
  color: var(--accent);
}

/* ── Page header ─────────────────────────────────────────────────── */

.fin-hero {
  padding: 2.5rem 1.5rem 1.25rem;
  max-width: 72rem;
  margin: 0 auto;
}

.fin-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.4rem;
  color: var(--text-primary);
}

.fin-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  max-width: 64ch;
  line-height: 1.55;
  margin: 0;
}

/* ── Sections ────────────────────────────────────────────────────── */

.fin-section {
  padding: 0 1.5rem 2.5rem;
  max-width: 72rem;
  margin: 0 auto;
  position: relative;
}

.fin-section + .fin-section {
  border-top: 1px solid var(--border);
  padding-top: 1.75rem;
}

.fin-section + .fin-section::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 1.5rem;
  width: 40px;
  height: 2px;
  background: var(--accent);
  border-radius: 0 0 2px 2px;
}

.fin-section__header {
  margin-bottom: 1.25rem;
}

.fin-section__title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-primary);
  margin: 0 0 0.25rem;
}

.fin-section__desc {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin: 0;
}

/* ── Calculator two-column layout ────────────────────────────────── */

.fin-calc {
  display: grid;
  grid-template-columns: minmax(260px, 340px) 1fr;
  gap: 1rem;
  align-items: start;
}

@media (max-width: 720px) {
  .fin-calc {
    grid-template-columns: 1fr;
  }
}

/* ── Input panel ─────────────────────────────────────────────────── */

.fin-inputs {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.fin-input-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.fin-input-group label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  display: flex;
  align-items: baseline;
  gap: 0.4em;
}

.fin-input-group label em {
  font-style: normal;
  color: var(--accent);
}

.fin-input-group__row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.fin-input-group input[type="range"] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 3px;
  background: var(--border-hover);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.fin-input-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  transition: transform 120ms ease;
}

.fin-input-group input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.25);
}

.fin-input-group input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  cursor: pointer;
}

.fin-input-group input[type="number"] {
  width: 82px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.3rem 0.5rem;
  color: var(--text-primary);
  text-align: right;
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}

.fin-input-group input[type="number"]:focus {
  outline: none;
  border-color: var(--accent);
}

/* ── Output panel ────────────────────────────────────────────────── */

.fin-output {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.fin-output__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

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

.fin-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  transition: border-color 200ms ease, transform 200ms ease, box-shadow 200ms ease;
}

.fin-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.5);
}

.fin-card--hero {
  background: var(--bg-card-hero);
  border-color: var(--accent-dim);
  box-shadow: inset 0 0 0 1px rgba(34,197,94,0.06);
}

.fin-card--hero:hover {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px rgba(34,197,94,0.1), 0 8px 24px rgba(0,0,0,0.5);
}

.fin-card__label {
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
}

.fin-card__value {
  font-family: var(--font-mono);
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.fin-card--hero .fin-card__value {
  font-size: 1.75rem;
  color: var(--accent);
}

.fin-card__sub {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-tertiary);
  margin-top: 0.25rem;
  font-variant-numeric: tabular-nums;
}

/* ── Greeks table ────────────────────────────────────────────────── */

.fin-greeks {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
}

.fin-greeks__title {
  font-size: 0.62rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-tertiary);
  margin-bottom: 0.75rem;
}

.fin-greeks__table {
  width: 100%;
  border-collapse: collapse;
}

.fin-greeks__table th,
.fin-greeks__table td {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-variant-numeric: tabular-nums;
  padding: 0.28rem 0;
}

.fin-greeks__table th {
  color: var(--text-tertiary);
  font-weight: 400;
  text-align: left;
  padding-right: 0.75rem;
  white-space: nowrap;
}

.fin-greeks__table td {
  color: var(--text-secondary);
  text-align: right;
}

.fin-greeks__table tr + tr th,
.fin-greeks__table tr + tr td {
  border-top: 1px solid var(--border);
}

.fin-greeks__table td.pos { color: var(--positive); }
.fin-greeks__table td.neg { color: var(--negative); }

/* ── DCF table ───────────────────────────────────────────────────── */

.fin-dcf-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
}

.fin-dcf-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.fin-dcf-table th {
  color: var(--text-tertiary);
  font-weight: 500;
  text-align: right;
  padding: 0.25rem 0.75rem 0.4rem 0;
  border-bottom: 1px solid var(--border);
}

.fin-dcf-table th:first-child { text-align: left; }

.fin-dcf-table td {
  color: var(--text-secondary);
  text-align: right;
  padding: 0.28rem 0.75rem 0.28rem 0;
}

.fin-dcf-table td:first-child {
  text-align: left;
  color: var(--text-tertiary);
}

.fin-dcf-table tr.dcf-terminal td {
  color: var(--text-primary);
  border-top: 1px solid var(--border);
}

.fin-dcf-table tr.dcf-total td {
  color: var(--accent);
  font-weight: 700;
  border-top: 1px dashed var(--accent-dim);
}

/* ── CAPM outputs ────────────────────────────────────────────────── */

.fin-capm-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

@media (max-width: 500px) {
  .fin-capm-cards {
    grid-template-columns: 1fr 1fr;
  }
}

/* ── SML chart ───────────────────────────────────────────────────── */

.fin-sml {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
}

.fin-sml__title {
  font-size: 0.62rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-tertiary);
  margin-bottom: 0.5rem;
}

.fin-sml svg {
  display: block;
  width: 100%;
  height: 120px;
  overflow: visible;
}

/* ── Formula reference ───────────────────────────────────────────── */

.fin-formula-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.75rem;
}

.fin-formula-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  transition: border-color 200ms ease;
}

.fin-formula-card:hover {
  border-color: var(--border-hover);
}

.fin-formula-card__name {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-secondary);
  margin-bottom: 0.6rem;
}

.fin-formula-card__eq {
  font-family: var(--font-mono);
  font-size: 0.77rem;
  color: var(--text-primary);
  line-height: 1.9;
}

.fin-formula-card__eq em {
  font-style: normal;
  color: var(--accent);
}

.fin-formula-card__note {
  font-size: 0.68rem;
  color: var(--text-tertiary);
  margin-top: 0.6rem;
  line-height: 1.55;
  border-top: 1px solid var(--border);
  padding-top: 0.5rem;
}

/* ── Mobile ──────────────────────────────────────────────────────── */

@media (max-width: 560px) {
  .fin-hero {
    padding: 1.75rem 1rem 1rem;
  }
  .fin-section {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  .fin-section + .fin-section::before {
    left: 1rem;
  }
  .fin-card--hero .fin-card__value {
    font-size: 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .fin-card,
  .fin-formula-card,
  .fin-input-group input[type="range"]::-webkit-slider-thumb {
    transition: none;
  }
}

/* ── Jump navigation ─────────────────────────────────────────────── */

.fin-jump-nav {
  padding: 0 1.5rem 1.25rem;
  max-width: 72rem;
  margin: 0 auto;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.fin-jump-nav::-webkit-scrollbar { display: none; }

.fin-jump-nav__inner {
  display: flex;
  gap: 0.4rem;
  white-space: nowrap;
}

.fin-jump-nav a {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 0.3rem 0.7rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: var(--text-tertiary);
  transition: color 150ms ease, border-color 150ms ease, background 150ms ease;
  text-decoration: none;
}
.fin-jump-nav a:hover {
  color: var(--text-secondary);
  border-color: var(--border-hover);
  background: var(--bg-card);
}
.fin-jump-nav a.active {
  color: var(--accent);
  border-color: var(--accent-dim);
  background: rgba(34,197,94,0.06);
}

/* ── Radio groups (CRR type/style, IV type) ──────────────────────── */

.fin-radio-group {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.fin-radio-group label {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  transition: color 150ms ease, border-color 150ms ease;
}
.fin-radio-group input[type="radio"] { display: none; }
.fin-radio-group input[type="radio"]:checked + span {
  color: var(--accent);
}
.fin-radio-group label:has(input:checked) {
  color: var(--accent);
  border-color: var(--accent-dim);
  background: rgba(34,197,94,0.06);
}

/* ── Chart cards (bond price-yield, EF SVG) ──────────────────────── */

.fin-chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
}

.fin-chart-card__title {
  font-size: 0.62rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-tertiary);
  margin-bottom: 0.5rem;
}

.fin-chart-card svg {
  display: block;
  width: 100%;
  overflow: visible;
}

#bond-chart-svg {
  height: 110px;
}

/* ── CRR tree ────────────────────────────────────────────────────── */

.fin-crr-tree {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
}

.fin-crr-tree__title {
  font-size: 0.62rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-tertiary);
  margin-bottom: 0.5rem;
}

.fin-crr-tree svg {
  display: block;
  width: 100%;
  height: 220px;
  overflow: visible;
}

/* ── EF chart (taller) ───────────────────────────────────────────── */

.fin-ef-chart svg {
  height: 200px;
}

/* ── Formula subgroups ───────────────────────────────────────────── */

.fin-formula-subgroup {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1rem;
  margin-bottom: 0.25rem;
}
.fin-formula-subgroup:first-child { margin-top: 0; }

.fin-formula-subgroup__label {
  font-size: 0.62rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  white-space: nowrap;
}

.fin-formula-subgroup__line {
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ── Formula lines (KaTeX per-line structure) ────────────────────── */

.fin-formula-line {
  display: block;
  line-height: 2.2;
}

/* ── KaTeX overrides ─────────────────────────────────────────────── */

.fin-formula-card__eq .katex {
  color: var(--text-primary);
  font-size: 0.82rem;
}

.fin-formula-card__eq .katex-display {
  margin: 0.2rem 0;
}

/* ── Wider calc layout for bond/ef (full-width output) ───────────── */

.fin-calc--wide {
  grid-template-columns: minmax(260px, 320px) 1fr;
}

@media (max-width: 620px) {
  .fin-calc--wide {
    grid-template-columns: 1fr;
  }
}

/* ── WACC output mini-grid ───────────────────────────────────────── */

.fin-wacc-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}
@media (max-width: 600px) {
  .fin-wacc-cards { grid-template-columns: 1fr 1fr; }
}

/* ── IV output ───────────────────────────────────────────────────── */

.fin-iv-notes {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-tertiary);
  line-height: 1.7;
}

/* ── CRR params row ──────────────────────────────────────────────── */

.fin-crr-params {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}
@media (max-width: 500px) {
  .fin-crr-params { grid-template-columns: 1fr 1fr; }
}
.fin-crr-param {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
}
.fin-crr-param__label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
}
.fin-crr-param__val {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 560px) {
  .fin-jump-nav { padding-left: 1rem; padding-right: 1rem; }
}