/* 5500 Relief — deep ink + amber compliance palette.
   Domain constant lives in index.html (canonical/og:url) and sitemap.xml. */

:root {
  --ink-900: #070c18;
  --ink-800: #0b1224;
  --ink-700: #111a30;
  --ink-600: #1a2440;
  --line: #26314f;
  --text: #e8ecf6;
  --muted: #9aa6c2;
  --amber: #f5b544;
  --amber-deep: #d98f14;
  --amber-soft: rgba(245, 181, 68, 0.12);
  --danger: #ff6b6b;
  --good: #4ade80;
  --radius: 16px;
  --shadow: 0 24px 60px -30px rgba(0, 0, 0, 0.9);
  --font-display: "Fraunces", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --font-body: "Inter", -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--ink-900);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap { width: min(1120px, 92vw); margin: 0 auto; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--amber); color: var(--ink-900);
  padding: 10px 16px; border-radius: 0 0 8px 0; z-index: 50;
}
.skip:focus { left: 0; }

/* ---------- header ---------- */
.site-head {
  position: sticky; top: 0; z-index: 20;
  background: rgba(7, 12, 24, 0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.head-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; height: 68px; }
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--text); text-decoration: none;
  font-family: var(--font-display); font-size: 1.15rem; letter-spacing: 0.01em;
}
.brand-mark { width: 26px; height: 26px; color: var(--amber); }
.head-nav { display: flex; gap: 22px; }
.head-nav a {
  color: var(--muted); text-decoration: none; font-size: 0.92rem; font-weight: 500;
  padding: 6px 0; border-bottom: 1px solid transparent; transition: color 0.18s, border-color 0.18s;
}
.head-nav a:hover, .head-nav a:focus-visible { color: var(--amber); border-color: var(--amber); }

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; padding: 72px 0 40px; }
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.orb {
  position: absolute; border-radius: 50%; filter: blur(70px); opacity: 0.5;
  animation: drift 22s ease-in-out infinite alternate;
}
.orb-a { width: 520px; height: 520px; top: -220px; right: -120px; background: radial-gradient(circle, rgba(245,181,68,0.55), transparent 65%); }
.orb-b { width: 460px; height: 460px; bottom: -240px; left: -140px; background: radial-gradient(circle, rgba(64,120,255,0.35), transparent 65%); animation-delay: -8s; }
.grid-lines {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(38,49,79,0.35) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(38,49,79,0.35) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 20%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 20%, transparent 72%);
}
@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(-40px, 30px, 0) scale(1.12); }
}

.hero-inner { position: relative; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  margin: 0 0 18px; padding: 6px 14px;
  border: 1px solid var(--line); border-radius: 999px;
  background: var(--amber-soft); color: var(--amber);
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
}
.eyebrow svg { width: 14px; height: 14px; }

h1 {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 5vw, 3.5rem);
  line-height: 1.08; letter-spacing: -0.02em;
  margin: 0 0 20px; max-width: 20ch;
}
.lede { color: var(--muted); font-size: 1.06rem; max-width: 68ch; margin: 0 0 18px; }
.lede strong { color: var(--text); font-weight: 600; }
.freshness {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--muted); font-size: 0.84rem; margin: 0;
}
.freshness svg { width: 15px; height: 15px; color: var(--good); }

/* ---------- calculator ---------- */
.calc { padding: 8px 0 64px; }
.calc-card {
  background: linear-gradient(180deg, var(--ink-700), var(--ink-800));
  border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 28px;
}
.calc-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 22px; }
.calc-head h2 { font-family: var(--font-display); font-size: 1.5rem; margin: 0; }
.calc-head p { margin: 0; color: var(--muted); font-size: 0.9rem; }

.field-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 18px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field label { font-size: 0.82rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }
.field input, .field select {
  background: var(--ink-900); color: var(--text);
  border: 1px solid var(--line); border-radius: 10px;
  padding: 11px 13px; font: inherit; font-size: 0.98rem;
  transition: border-color 0.16s, box-shadow 0.16s;
}
.field input:focus, .field select:focus {
  outline: none; border-color: var(--amber);
  box-shadow: 0 0 0 3px rgba(245, 181, 68, 0.18);
}
.field .hint { font-size: 0.78rem; color: var(--muted); }

.years-head { display: flex; align-items: center; justify-content: space-between; margin: 26px 0 10px; }
.years-head h3 { font-size: 1rem; margin: 0; letter-spacing: 0.02em; }
.btn {
  font: inherit; font-size: 0.88rem; font-weight: 600;
  border-radius: 10px; padding: 9px 16px; cursor: pointer;
  border: 1px solid var(--line); background: var(--ink-600); color: var(--text);
  transition: transform 0.12s, border-color 0.16s, background 0.16s;
}
.btn:hover { border-color: var(--amber); color: var(--amber); }
.btn:active { transform: translateY(1px); }
.btn-ghost { background: transparent; }
.btn-primary {
  background: linear-gradient(180deg, var(--amber), var(--amber-deep));
  color: #1a1204; border-color: transparent;
}
.btn-primary:hover { color: #1a1204; filter: brightness(1.06); }

.year-row { display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: end; margin-bottom: 12px; }
.year-row .remove { align-self: center; }

/* ---------- results ---------- */
.results { margin-top: 30px; }
.result-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.stat {
  background: var(--ink-900); border: 1px solid var(--line);
  border-radius: 14px; padding: 18px 20px;
}
.stat .label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--muted); margin: 0 0 8px; }
.stat .value { font-family: var(--font-display); font-size: clamp(1.6rem, 3.4vw, 2.2rem); line-height: 1.1; margin: 0; font-variant-numeric: tabular-nums; }
.stat .sub { margin: 8px 0 0; font-size: 0.82rem; color: var(--muted); }
.stat.is-dfvcp { border-color: rgba(245, 181, 68, 0.55); background: linear-gradient(180deg, rgba(245,181,68,0.10), var(--ink-900)); }
.stat.is-dfvcp .value { color: var(--amber); }
.stat.is-exposure .value { color: var(--danger); }
.stat.is-irs .value { color: #ffb4a2; }
.stat.is-savings .value { color: var(--good); }

table.years { width: 100%; border-collapse: collapse; margin-top: 22px; font-size: 0.92rem; }
table.years caption { text-align: left; color: var(--muted); font-size: 0.82rem; padding-bottom: 8px; }
table.years th, table.years td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: right; }
table.years th:first-child, table.years td:first-child { text-align: left; }
table.years thead th { font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); font-weight: 600; }
table.years tbody tr:hover { background: rgba(245, 181, 68, 0.05); }
table.years td.num { font-variant-numeric: tabular-nums; }
.cap-flag { display: inline-block; margin-left: 6px; padding: 1px 7px; border-radius: 999px; background: var(--amber-soft); color: var(--amber); font-size: 0.7rem; font-weight: 600; }

.note { margin-top: 18px; font-size: 0.84rem; color: var(--muted); }

/* ---------- compare ---------- */
.compare { padding: 20px 0 64px; }
.compare h2, .rules h2, .faq h2 { font-family: var(--font-display); font-size: clamp(1.6rem, 3vw, 2.1rem); margin: 0 0 8px; }
.section-lede { color: var(--muted); margin: 0 0 26px; max-width: 70ch; }
.bars { display: grid; gap: 16px; }
.bar-row { display: grid; grid-template-columns: 190px 1fr; gap: 16px; align-items: center; }
.bar-row .name { font-size: 0.9rem; color: var(--muted); }
.bar-track { background: var(--ink-700); border: 1px solid var(--line); border-radius: 999px; height: 34px; overflow: hidden; }
.bar-fill {
  height: 100%; width: 0; border-radius: 999px;
  transition: width 0.9s cubic-bezier(0.22, 1, 0.36, 1);
  display: flex; align-items: center; justify-content: flex-end;
  padding-right: 12px; font-size: 0.82rem; font-weight: 700; color: #1a1204;
}
.bar-fill.exposure { background: linear-gradient(90deg, #7f1d1d, var(--danger)); color: #fff; }
.bar-fill.dfvcp { background: linear-gradient(90deg, var(--amber-deep), var(--amber)); }
.bar-fill.savings { background: linear-gradient(90deg, #166534, var(--good)); }

/* ---------- rules ---------- */
.rules { padding: 20px 0 64px; }
.rules-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; }
.rule-card { background: var(--ink-800); border: 1px solid var(--line); border-radius: 14px; padding: 20px; }
.rule-card h3 { margin: 0 0 8px; font-size: 1rem; }
.rule-card p { margin: 0; color: var(--muted); font-size: 0.9rem; }
.rule-card .big { font-family: var(--font-display); font-size: 1.5rem; color: var(--amber); display: block; margin-bottom: 6px; }

/* ---------- faq ---------- */
.faq { padding: 20px 0 80px; }
.faq details {
  border: 1px solid var(--line); border-radius: 12px;
  background: var(--ink-800); padding: 16px 20px; margin-bottom: 12px;
}
.faq summary { cursor: pointer; font-weight: 600; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--amber); font-weight: 700; }
.faq details[open] summary::after { content: "\2212"; }
.faq p { color: var(--muted); margin: 12px 0 0; font-size: 0.94rem; }
.faq a, .rules a, .note a { color: var(--amber); }

/* ---------- footer ---------- */
.site-foot { border-top: 1px solid var(--line); padding: 28px 0 44px; color: var(--muted); font-size: 0.84rem; }
.site-foot p { margin: 0 0 8px; }

/* ---------- motion preferences ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .orb { animation: none; }
  .bar-fill { transition: none; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

@media (max-width: 720px) {
  .head-nav { display: none; }
  .bar-row { grid-template-columns: 1fr; gap: 6px; }
  .calc-card { padding: 20px; }
}