/* 529 OBBBA Qualified Expense Navigator — styles.
   Niche-native: calm, trustworthy college-savings / finance feel. Deep indigo
   accent, generous spacing, WCAG-AA text, visible focus rings, dark mode.
   Verified to hold at wide desktop (>1080px) and narrow mobile. */

:root {
  --bg: #f6f8fc;
  --card: #ffffff;
  --ink: #131a2b;
  --ink-soft: #46506a;
  --line: #e2e8f3;
  --accent: #2b4ea8;       /* indigo (savings/finance) */
  --accent-dk: #1d3a82;
  --accent-soft: #eef2fb;
  --teal: #0f766e;
  --ok: #157a39;
  --ok-bg: #e7f6ec;
  --warn: #8f6200;
  --warn-bg: #fbf3df;
  --no: #b42318;
  --no-bg: #fdeceb;
  --unknown: #475569;
  --unknown-bg: #eef1f6;
  --cap: #5b3fb0;
  --cap-bg: #efeafb;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(19, 26, 43, .05), 0 8px 24px rgba(19, 26, 43, .06);
  --maxw: 880px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c1018;
    --card: #141a26;
    --ink: #eef2f9;
    --ink-soft: #aeb8cd;
    --line: #283142;
    --accent: #7e9cf0;
    --accent-dk: #9db4f5;
    --accent-soft: #1a2336;
    --teal: #5eddd0;
    --ok: #6ee7a0;
    --ok-bg: #10241a;
    --warn: #f5cf6b;
    --warn-bg: #2a2310;
    --no: #f7a097;
    --no-bg: #2c1614;
    --unknown: #b6c0d4;
    --unknown-bg: #1a2230;
    --cap: #c4b1f5;
    --cap-bg: #1d1830;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .35);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-size: 17px;
}

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

a { color: var(--accent); }
a:focus-visible, button:focus-visible, select:focus-visible, input:focus-visible, summary:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ---------- header ---------- */
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 20;
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.logo { display: inline-flex; align-items: center; gap: 9px; font-weight: 800; text-decoration: none; color: var(--ink); font-size: 1.05rem; letter-spacing: -.01em; }
.logo .mark {
  display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(150deg, var(--accent), var(--accent-dk)); color: #fff; font-weight: 800; font-size: .9rem;
  line-height: 1; letter-spacing: 0; font-variant-numeric: tabular-nums;
}
.site-nav { display: flex; gap: 18px; }
.site-nav a { text-decoration: none; color: var(--ink-soft); font-weight: 600; font-size: .94rem; }
.site-nav a:hover { color: var(--accent); }

/* ---------- stale banner ---------- */
.stale-banner {
  background: var(--warn-bg); color: var(--warn);
  border-bottom: 1px solid color-mix(in srgb, var(--warn) 30%, transparent);
  padding: 10px 20px; font-size: .9rem; font-weight: 600; text-align: center;
}

/* ---------- hero ---------- */
.hero { padding: 44px 0 18px; }
.kicker {
  display: inline-block; background: var(--accent-soft); color: var(--accent-dk);
  font-weight: 700; font-size: .76rem; letter-spacing: .04em; text-transform: uppercase;
  padding: 5px 11px; border-radius: 999px; margin-bottom: 14px;
}
.hero h1 { font-size: clamp(1.7rem, 4.2vw, 2.6rem); line-height: 1.12; margin: 0 0 12px; letter-spacing: -.02em; }
.hero h1 em { color: var(--accent); font-style: normal; }
.hero .sub { font-size: 1.08rem; color: var(--ink-soft); margin: 0 0 18px; max-width: 60ch; }
.vchip {
  display: inline-flex; align-items: center; gap: 6px; text-decoration: none;
  background: var(--ok-bg); color: var(--ok); border: 1px solid color-mix(in srgb, var(--ok) 25%, transparent);
  padding: 6px 12px; border-radius: 999px; font-size: .84rem; font-weight: 600;
}
.vchip b { font-weight: 800; }
.privacy-badge { margin-top: 14px; color: var(--ink-soft); font-size: .85rem; display: flex; align-items: center; gap: 7px; }
.privacy-badge .dot { color: var(--ok); }

/* ---------- generic blocks ---------- */
.block { padding: 26px 0; border-top: 1px solid var(--line); margin-top: 30px; }
.block h2 { font-size: 1.45rem; margin: 0 0 8px; letter-spacing: -.01em; }
.block .lead { color: var(--ink-soft); margin: 0 0 18px; max-width: 64ch; }
h3 { font-size: 1.08rem; margin: 22px 0 8px; }

/* ---------- decision tool ---------- */
.nav-shell, .cap-shell {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 20px; margin: 6px 0 0;
}
.nav-pickers { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; align-items: end; }
.nav-field { display: flex; flex-direction: column; gap: 6px; }
.nav-field-year { grid-column: 1 / -1; max-width: 340px; }
.nav-field label, .cap-field label { font-weight: 600; font-size: .9rem; color: var(--ink-soft); }
select, input[type="number"] {
  width: 100%; font: inherit; font-size: 1rem; color: var(--ink); background: var(--bg);
  border: 1.5px solid var(--line); border-radius: 10px; padding: 11px 12px; appearance: none;
}
select:hover, input[type="number"]:hover { border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }

.nav-result { margin-top: 18px; }
.nav-hint, .cap-hint {
  color: var(--ink-soft); background: var(--accent-soft); border: 1px dashed color-mix(in srgb, var(--accent) 30%, transparent);
  padding: 14px 16px; border-radius: 10px; margin: 0; font-size: .95rem;
}

/* verdict cards */
.verdict { border: 1px solid var(--line); border-radius: 12px; padding: 16px; margin: 0 0 14px; background: var(--card); }
.verdict-state { background: var(--bg); }
.verdict-head { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 10px; }
.badge {
  display: inline-block; padding: 4px 10px; border-radius: 999px; font-size: .8rem; font-weight: 700; line-height: 1.3;
}
.badge-yes { background: var(--ok-bg); color: var(--ok); }
.badge-cond { background: var(--warn-bg); color: var(--warn); }
.badge-no { background: var(--no-bg); color: var(--no); }
.badge-cap { background: var(--cap-bg); color: var(--cap); }
.badge-unknown { background: var(--unknown-bg); color: var(--unknown); }
.verdict-conditions { margin: 6px 0 0; padding-left: 20px; color: var(--ink-soft); font-size: .95rem; }
.verdict-conditions li { margin: 4px 0; }
.verdict-callout { margin-top: 12px; background: var(--warn-bg); border: 1px solid color-mix(in srgb, var(--warn) 28%, transparent); border-radius: 10px; padding: 12px 14px; font-size: .92rem; }
.verdict-callout ul { margin: 6px 0 0; padding-left: 20px; }
.verdict-callout ul ul { margin: 4px 0; }
.verdict-state-detail { color: var(--ink-soft); font-size: .93rem; margin: 4px 0 8px; }
.verdict-rider { font-size: .92rem; margin: 0 0 8px; font-weight: 600; }
.verdict-src { margin: 4px 0 0; font-size: .85rem; }
.verdict-src a { font-weight: 600; }
.nav-capline { font-size: .94rem; color: var(--ink-soft); margin: 0 0 12px; }
.nav-inline-link { font-weight: 700; white-space: nowrap; }
.nav-disclaimer { margin: 14px 0 0; font-size: .82rem; color: var(--ink-soft); border-top: 1px dashed var(--line); padding-top: 12px; }

/* ---------- cap calculator ---------- */
.cap-fields { display: grid; grid-template-columns: 140px 1fr 1fr; gap: 14px; align-items: end; }
.cap-field { display: flex; flex-direction: column; gap: 6px; }
.cap-result { margin-top: 18px; }
.cap-card { border: 1px solid var(--line); border-radius: 12px; padding: 8px 16px 16px; }
.cap-line { display: flex; justify-content: space-between; gap: 16px; padding: 9px 0; border-bottom: 1px solid var(--line); font-size: .96rem; }
.cap-line .cap-amt { font-variant-numeric: tabular-nums; font-weight: 600; white-space: nowrap; }
.cap-subtotal { font-weight: 700; }
.cap-net { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding: 16px 0 6px; }
.cap-net-label { font-weight: 700; }
.cap-net-big { font-size: 1.7rem; font-weight: 800; color: var(--accent); font-variant-numeric: tabular-nums; }
.cap-over { margin-top: 12px; background: var(--no-bg); border: 1px solid color-mix(in srgb, var(--no) 26%, transparent); border-radius: 10px; padding: 12px 14px; font-size: .92rem; }
.cap-ok { margin-top: 12px; background: var(--ok-bg); border: 1px solid color-mix(in srgb, var(--ok) 26%, transparent); border-radius: 10px; padding: 12px 14px; font-size: .92rem; color: var(--ok); font-weight: 600; }
.cap-sub { color: var(--ink-soft); font-size: .9rem; margin: 8px 0 0; }
.cap-note { font-size: .82rem; color: var(--ink-soft); border-top: 1px dashed var(--line); padding-top: 12px; margin-top: 14px; }

/* ---------- tables ---------- */
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; border: 1px solid var(--line); border-radius: 12px; }
table.manifest { width: 100%; border-collapse: collapse; font-size: .92rem; min-width: 560px; }
table.manifest th, table.manifest td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.manifest thead th { background: var(--accent-soft); color: var(--accent-dk); font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; }
table.manifest tr:last-child td { border-bottom: none; }
table.manifest td.src a { font-size: .85rem; font-weight: 600; }

/* state lists */
.statecols { columns: 2; column-gap: 24px; margin: 8px 0 0; padding: 0; list-style: none; }
.statecols li { break-inside: avoid; padding: 3px 0; color: var(--ink-soft); font-size: .92rem; }
@media (max-width: 560px) { .statecols { columns: 1; } }

/* ---------- FAQ ---------- */
.faq details { border: 1px solid var(--line); border-radius: 10px; padding: 4px 16px; margin: 10px 0; background: var(--card); }
.faq summary { cursor: pointer; font-weight: 700; padding: 10px 0; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--accent); font-weight: 800; }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin: 0 0 12px; color: var(--ink-soft); }

/* affiliate slot */
.aff-box { border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; margin-top: 18px; background: var(--card); }
.aff-head { font-weight: 700; margin: 0 0 8px; }
.aff-box ul { margin: 0; padding-left: 18px; }
.aff-disclosure { font-size: .78rem; color: var(--ink-soft); margin: 8px 0 0; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); background: var(--card); margin-top: 40px; padding: 28px 0; }
.site-footer .cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.site-footer h4 { font-size: .82rem; text-transform: uppercase; letter-spacing: .04em; color: var(--ink-soft); margin: 0 0 10px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin: 6px 0; font-size: .9rem; color: var(--ink-soft); }
.site-footer a { color: var(--ink-soft); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }
.fine { margin: 22px 0 0; font-size: .8rem; color: var(--ink-soft); line-height: 1.5; }
.neutrality { font-size: .85rem; color: var(--ink-soft); margin: 14px 0 0; }
.src-note { font-size: .82rem; color: var(--ink-soft); margin: 8px 0 0; }

/* ---------- responsive ---------- */
@media (max-width: 720px) {
  .nav-pickers { grid-template-columns: 1fr; }
  .nav-field-year { max-width: none; }
  .cap-fields { grid-template-columns: 1fr; }
  .site-footer .cols { grid-template-columns: 1fr; }
  .site-nav { display: none; }
}