:root {
  --navy: #0a2540;
  --navy-2: #183b56;
  --violet: #6d28d9;
  --violet-dark: #5420ad;
  --violet-soft: #f3effd;
  --cream: #fbfaf6;
  --paper: #ffffff;
  --ink: #152536;
  --muted: #5d6b78;
  --line: #dce3e9;
  --green: #16794b;
  --amber: #9a5b00;
  --red: #a33131;
  --shadow: 0 18px 50px rgba(10, 37, 64, 0.08);
  --radius: 18px;
  --max: 1160px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--cream);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 96% 2%, rgba(109, 40, 217, 0.10), transparent 27rem),
    var(--cream);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--violet-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover { color: var(--violet); }

img, svg { max-width: 100%; }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -5rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  color: #fff;
  background: var(--navy);
  border-radius: 8px;
}

.skip-link:focus { top: 1rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(220, 227, 233, 0.88);
  background: rgba(251, 250, 246, 0.94);
  backdrop-filter: blur(14px);
}

.nav-shell,
.shell {
  width: min(var(--max), calc(100% - 40px));
  margin-inline: auto;
}

.nav-shell {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--navy);
  font-weight: 800;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: #fff;
  background: var(--navy);
  border-radius: 11px;
  font-size: 12px;
  letter-spacing: 0.04em;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  align-items: center;
  font-size: 14px;
  font-weight: 700;
}

.nav-links a {
  color: var(--navy-2);
  text-decoration: none;
}

.nav-links a[aria-current="page"] { color: var(--violet); }

.breadcrumbs {
  padding: 24px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.breadcrumbs a { color: inherit; }

.hero {
  padding: 72px 0 54px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(260px, 0.65fr);
  gap: 56px;
  align-items: end;
}

.eyebrow {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--violet-dark);
  font-size: 12px;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1, h2, h3 {
  color: var(--navy);
  line-height: 1.12;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 900px;
  margin: 0 0 24px;
  font-size: clamp(2.55rem, 6vw, 5.1rem);
}

h2 {
  margin: 0 0 18px;
  font-size: clamp(2rem, 4vw, 3.1rem);
}

h3 {
  margin: 0 0 10px;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.lede {
  max-width: 760px;
  margin: 0;
  color: var(--navy-2);
  font-size: clamp(1.12rem, 2vw, 1.35rem);
  line-height: 1.55;
}

.byline {
  padding: 22px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  border-radius: 14px;
  color: var(--muted);
  font-size: 14px;
}

.byline strong {
  display: block;
  margin-bottom: 4px;
  color: var(--navy);
  font-size: 16px;
}

.answer-capsule {
  margin: 0 0 28px;
  padding: 24px 26px;
  border: 1px solid rgba(109, 40, 217, 0.24);
  border-left: 5px solid var(--violet);
  background: var(--paper);
  border-radius: 12px;
  box-shadow: 0 9px 24px rgba(10, 37, 64, 0.05);
  font-size: 1.06rem;
}

.answer-capsule p { margin: 0; }

.metric-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  overflow: hidden;
  margin-top: 22px;
  border: 1px solid var(--line);
  background: var(--line);
  border-radius: 12px;
}

.metric {
  padding: 20px;
  background: var(--paper);
}

.metric strong {
  display: block;
  color: var(--violet-dark);
  font-size: 1.5rem;
  line-height: 1.1;
}

.metric span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.section {
  padding: 78px 0;
  border-top: 1px solid var(--line);
}

.section.paper { background: rgba(255, 255, 255, 0.68); }

.section-intro {
  max-width: 760px;
  margin-bottom: 38px;
}

.section-intro p {
  margin: 0;
  color: var(--muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  display: flex;
  flex-direction: column;
  min-height: 230px;
  padding: 26px;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: var(--radius);
  box-shadow: 0 8px 22px rgba(10, 37, 64, 0.035);
}

.card .tag {
  margin-bottom: 22px;
  color: var(--violet-dark);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.card p {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 15px;
}

.card .card-link {
  margin-top: auto;
  font-size: 14px;
  font-weight: 800;
}

.card.featured {
  grid-column: span 2;
  color: #fff;
  border-color: var(--navy);
  background:
    linear-gradient(135deg, rgba(109, 40, 217, 0.24), transparent 55%),
    var(--navy);
}

.card.featured h3,
.card.featured .tag { color: #fff; }

.card.featured p { color: #dce7ef; }

.card.featured a { color: #fff; }

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid var(--violet);
  color: #fff;
  background: var(--violet);
  border-radius: 9px;
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
}

.button:hover {
  color: #fff;
  background: var(--violet-dark);
}

.button.secondary {
  color: var(--navy);
  border-color: var(--line);
  background: var(--paper);
}

.button.secondary:hover {
  color: var(--violet-dark);
  border-color: var(--violet);
}

.table-wrap {
  overflow-x: auto;
  margin: 28px 0;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--paper);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
  font-size: 14px;
}

th, td {
  padding: 15px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--navy);
  background: #f2f5f7;
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

tr:last-child td { border-bottom: 0; }

.checklist {
  display: grid;
  gap: 22px;
}

.check-group {
  padding: 28px;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: var(--radius);
}

.check-group header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: baseline;
  margin-bottom: 18px;
}

.check-group header span {
  color: var(--muted);
  font-size: 13px;
}

.check-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list label {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 10px;
  align-items: start;
  padding: 10px 0;
}

.check-list input {
  width: 18px;
  height: 18px;
  margin-top: 4px;
  accent-color: var(--violet);
}

.tool-panel {
  padding: 32px;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.field {
  display: grid;
  gap: 7px;
}

.field label {
  color: var(--navy);
  font-size: 13px;
  font-weight: 800;
}

.field small {
  color: var(--muted);
  font-size: 12px;
}

.field input {
  width: 100%;
  min-height: 48px;
  padding: 10px 12px;
  border: 1px solid #c9d3dc;
  border-radius: 8px;
  color: var(--navy);
  background: #fff;
  font: inherit;
}

.field input:focus {
  outline: 3px solid rgba(109, 40, 217, 0.18);
  border-color: var(--violet);
}

.results {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.result {
  padding: 20px 16px;
  border: 1px solid var(--line);
  background: var(--cream);
  border-radius: 10px;
}

.result span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.result strong {
  display: block;
  margin-top: 8px;
  color: var(--navy);
  font-size: 1.45rem;
  line-height: 1.1;
}

.note {
  padding: 18px 20px;
  border-left: 4px solid var(--amber);
  background: #fff8e8;
  border-radius: 8px;
  color: #5a4218;
  font-size: 14px;
}

.source-list {
  display: grid;
  gap: 12px;
  padding-left: 1.25rem;
}

.source-list li { padding-left: 4px; }

.source-list small {
  display: block;
  color: var(--muted);
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  counter-reset: phase;
}

.phase {
  position: relative;
  padding: 26px 22px;
  border-top: 5px solid var(--violet);
  background: var(--paper);
  border-radius: 0 0 14px 14px;
  box-shadow: 0 8px 20px rgba(10, 37, 64, 0.04);
  counter-increment: phase;
}

.phase::before {
  content: "0" counter(phase);
  display: block;
  margin-bottom: 22px;
  color: var(--violet);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.phase .period {
  display: block;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.phase ul {
  margin: 16px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 14px;
}

.faq-list {
  max-width: 860px;
}

.faq-list details {
  border-top: 1px solid var(--line);
  padding: 20px 0;
}

.faq-list details:last-child { border-bottom: 1px solid var(--line); }

.faq-list summary {
  color: var(--navy);
  font-size: 18px;
  font-weight: 800;
  cursor: pointer;
}

.faq-list details p {
  margin: 14px 0 0;
  color: var(--muted);
}

.author-card {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 22px;
  align-items: center;
  max-width: 820px;
  padding: 24px;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 14px;
}

.author-card img {
  width: 76px;
  height: 76px;
  object-fit: cover;
  border-radius: 50%;
}

.author-card p { margin: 7px 0; color: var(--muted); }

.author-card .links { font-size: 14px; }

.site-footer {
  padding: 46px 0;
  color: #dfe9f0;
  background: var(--navy);
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 40px;
}

.site-footer h2 {
  margin: 0 0 12px;
  color: #fff;
  font-size: 1.4rem;
}

.site-footer p { max-width: 650px; margin: 0; }

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px;
}

.site-footer a { color: #fff; }

.fine-print {
  margin-top: 26px !important;
  color: #aebfcb;
  font-size: 12px;
}

@media (max-width: 900px) {
  .hero-grid,
  .footer-grid { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .card.featured { grid-column: span 2; }
  .timeline { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .results { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-footer nav { justify-content: flex-start; }
}

@media (max-width: 650px) {
  body { font-size: 16px; }
  .nav-shell, .shell { width: min(100% - 28px, var(--max)); }
  .nav-shell { min-height: 64px; }
  .nav-links a:not(:last-child) { display: none; }
  .hero { padding: 52px 0 42px; }
  h1 { font-size: clamp(2.35rem, 13vw, 3.7rem); }
  .metric-strip,
  .card-grid,
  .timeline,
  .calc-grid,
  .results,
  .check-list { grid-template-columns: 1fr; }
  .card.featured { grid-column: auto; }
  .section { padding: 58px 0; }
  .tool-panel, .check-group { padding: 22px 18px; }
  .author-card { grid-template-columns: 1fr; }
}

@media print {
  body { background: #fff; font-size: 11pt; }
  .site-header, .site-footer, .breadcrumbs, .button-row, .no-print { display: none !important; }
  .hero, .section { padding: 24px 0; }
  .shell { width: 100%; }
  .card, .check-group, .tool-panel, .phase { break-inside: avoid; box-shadow: none; }
  a { color: #000; text-decoration: none; }
  .table-wrap { overflow: visible; }
  table { min-width: 0; font-size: 9pt; }
}