:root {
  --ink: #12202e;
  --ink-soft: #3a4a5c;
  --paper: #f7f5f1;
  --paper-2: #efeae2;
  --surface: #ffffff;
  --line: #d7d0c5;
  --navy: #0b1f33;
  --navy-2: #16324d;
  --teal: #0f766e;
  --teal-deep: #0a5c56;
  --amber: #b45309;
  --danger: #9f1239;
  --ok: #166534;
  --focus: #0284c7;
  --shadow: 0 12px 40px rgba(11, 31, 51, 0.08);
  --radius: 12px;
  --radius-sm: 8px;
  --max: 1120px;
  --font-sans: "IBM Plex Sans", "Segoe UI", sans-serif;
  --font-serif: "IBM Plex Serif", Georgia, serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;
  --header-h: 4rem;
}

@font-face {
  font-family: "IBM Plex Sans";
  src: url("/assets/fonts/ibm-plex-sans-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("/assets/fonts/ibm-plex-sans-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("/assets/fonts/ibm-plex-sans-600.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("/assets/fonts/ibm-plex-sans-700.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Serif";
  src: url("/assets/fonts/ibm-plex-serif-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Serif";
  src: url("/assets/fonts/ibm-plex-serif-600.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("/assets/fonts/ibm-plex-mono-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(15, 118, 110, 0.10), transparent 60%),
    radial-gradient(900px 400px at 100% 0%, rgba(11, 31, 51, 0.08), transparent 55%),
    linear-gradient(180deg, var(--paper) 0%, #f3f0ea 40%, var(--paper) 100%);
  line-height: 1.6;
  min-height: 100vh;
}

img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--teal-deep); text-underline-offset: 0.15em; }
a:hover { color: var(--navy); }
:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--navy);
  color: #fff;
  padding: 0.75rem 1rem;
  z-index: 1000;
}
.skip-link:focus { left: 1rem; top: 1rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background: rgba(247, 245, 241, 0.92);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--navy);
  min-width: 0;
}
.brand-mark {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.brand-sub {
  font-size: 0.72rem;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.75rem;
  font: inherit;
  cursor: pointer;
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
  align-items: center;
}
.site-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.92rem;
  font-weight: 500;
}
.site-nav a:hover,
.site-nav a[aria-current="page"] { color: var(--navy); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: 999px;
  padding: 0.7rem 1.15rem;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--navy);
  color: #fff;
}
.btn-primary:hover { background: var(--navy-2); color: #fff; }
.btn-secondary {
  background: transparent;
  border-color: var(--line);
  color: var(--navy);
}
.btn-secondary:hover { border-color: var(--navy); }

.site-nav .nav-login {
  padding: 0.45rem 0.9rem;
  font-size: 0.88rem;
  color: #fff !important;
}
.site-nav .nav-login:hover { color: #fff !important; }

.login-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 1.25rem;
  margin: 1.5rem 0 2rem;
  align-items: start;
}
.login-shell-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--shadow);
}
.login-shell-brand {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--navy);
  margin: 0 0 0.35rem;
}
.login-shell-card h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-serif);
  color: var(--navy);
}
.login-shell-note {
  color: var(--ink-soft);
  margin: 0 0 1rem;
  font-size: 0.95rem;
}
.login-shell-fields { display: grid; gap: 0.65rem; }
.login-shell-field,
.login-shell-cta {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  color: #8a94a1;
  background: #fafafa;
  user-select: none;
  pointer-events: none;
}
.login-shell-cta {
  background: var(--navy);
  color: rgba(255,255,255,0.55);
  text-align: center;
  font-weight: 600;
  border-color: var(--navy);
}
.login-aside { display: grid; gap: 0.85rem; }

@media (max-width: 800px) {
  .login-shell { grid-template-columns: 1fr; }
}

.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 5rem) 1.25rem 2.5rem;
  display: grid;
  gap: 1.5rem;
}
.hero-brand {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--navy);
  margin: 0;
}
.hero-lead {
  max-width: 42rem;
  font-size: 1.125rem;
  color: var(--ink-soft);
  margin: 0;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.25rem 1.25rem;
}
.section + .section { padding-top: 0.5rem; }
.section h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
  color: var(--navy);
}
.section-lead {
  color: var(--ink-soft);
  max-width: 46rem;
  margin: 0 0 1.25rem;
}

.grid-3, .grid-2, .grid-4 {
  display: grid;
  gap: 1rem;
}
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.panel {
  background: rgba(255,255,255,0.72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.15rem 1.2rem;
}
.panel h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  color: var(--navy);
}
.panel p { margin: 0; color: var(--ink-soft); font-size: 0.95rem; }
.panel a.panel-link {
  display: inline-block;
  margin-top: 0.75rem;
  font-weight: 600;
  text-decoration: none;
}

.breadcrumbs {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem 1.25rem 0;
  font-size: 0.88rem;
  color: var(--ink-soft);
}
.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
}
.breadcrumbs li:not(:last-child)::after {
  content: "/";
  margin-left: 0.35rem;
  color: var(--line);
}
.breadcrumbs a { color: inherit; text-decoration: none; }
.breadcrumbs a:hover { color: var(--navy); }

.page-header {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 0.5rem;
}
.page-header h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  letter-spacing: -0.02em;
  margin: 0 0 0.6rem;
  color: var(--navy);
  line-height: 1.15;
}
.page-header .deck {
  margin: 0;
  max-width: 46rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.answer-block {
  border-left: 3px solid var(--teal);
  padding: 0.85rem 1rem;
  background: rgba(15, 118, 110, 0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1rem 0;
}
.answer-block strong { color: var(--navy); }

.evidence {
  display: grid;
  gap: 0.55rem;
  margin: 1rem 0 1.5rem;
  padding: 1rem;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.55);
}
.evidence dl {
  display: grid;
  grid-template-columns: 10rem 1fr;
  gap: 0.35rem 0.75rem;
  margin: 0;
  font-size: 0.92rem;
}
.evidence dt { color: var(--ink-soft); font-weight: 600; }
.evidence dd { margin: 0; }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-soft);
}
.badge-ok { border-color: #86efac; color: var(--ok); background: #f0fdf4; }
.badge-warn { border-color: #fcd34d; color: var(--amber); background: #fffbeb; }
.badge-danger { border-color: #fda4af; color: var(--danger); background: #fff1f2; }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
table.data th,
table.data td {
  text-align: left;
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
table.data th {
  background: var(--paper-2);
  color: var(--navy);
  font-weight: 600;
}
table.data tr:last-child td { border-bottom: 0; }

.timeline { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; }
.timeline li {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 1rem;
  padding: 1rem;
  background: rgba(255,255,255,0.7);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.timeline .date {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--teal-deep);
  font-weight: 600;
}

.alert {
  padding: 0.9rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-soft);
  font-size: 0.95rem;
}
.alert-info { border-color: #7dd3fc; background: #f0f9ff; }
.alert-warn { border-color: #fcd34d; background: #fffbeb; }

.site-footer {
  margin-top: 3rem;
  border-top: 1px solid var(--line);
  background: var(--navy);
  color: #dbe4ee;
}
.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.5rem 1.25rem;
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1.3fr 1fr 1fr 1fr;
}
.site-footer a { color: #b7c7d6; text-decoration: none; }
.site-footer a:hover { color: #fff; }
.site-footer h2 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 0.75rem;
  color: #8fa3b6;
  font-family: var(--font-sans);
  font-weight: 600;
}
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.4rem; }
.footer-brand {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: #fff;
  margin: 0 0 0.5rem;
}
.footer-note { font-size: 0.85rem; color: #8fa3b6; max-width: 28rem; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 1rem 1.25rem 1.5rem;
  max-width: var(--max);
  margin: 0 auto;
  font-size: 0.8rem;
  color: #8fa3b6;
}

.related-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}
.related-nav a {
  text-decoration: none;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  color: var(--navy);
}

.ask-box {
  display: grid;
  gap: 0.75rem;
  margin: 1rem 0 1.5rem;
}
.ask-box input[type="search"] {
  width: 100%;
  padding: 0.9rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  font: inherit;
  background: #fff;
}
.ask-results { display: grid; gap: 1rem; }

.chart-placeholder {
  height: 220px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(15,118,110,0.08), transparent),
    repeating-linear-gradient(90deg, transparent, transparent 39px, rgba(11,31,51,0.05) 40px),
    #fff;
  display: grid;
  place-items: center;
  color: var(--ink-soft);
  font-size: 0.92rem;
  text-align: center;
  padding: 1rem;
}

.price-bars {
  display: flex;
  align-items: flex-end;
  gap: 1rem;
  min-height: 200px;
  padding: 1rem 1.25rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}
.price-bar {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--ink-soft);
}
.price-bar-fill {
  width: 100%;
  max-width: 48px;
  border-radius: 8px 8px 2px 2px;
  background: linear-gradient(180deg, var(--teal), var(--navy));
}

.locale-switch { display: flex; flex-wrap: wrap; gap: 0.4rem; font-size: 0.8rem; }
.locale-switch a {
  color: #b7c7d6;
  text-decoration: none;
  border: 1px solid rgba(255,255,255,0.12);
  padding: 0.2rem 0.45rem;
  border-radius: 6px;
}

@media (max-width: 900px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .timeline li { grid-template-columns: 1fr; }
  .evidence dl { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    display: none;
    position: absolute;
    left: 0; right: 0; top: 100%;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 1rem 1.25rem 1.25rem;
  }
  .site-nav.is-open { display: block; }
  .site-nav ul { flex-direction: column; align-items: flex-start; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .header-inner { position: relative; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}

@media print {
  .site-header, .nav-toggle, .site-footer .locale-switch { display: none !important; }
  body { background: #fff; color: #000; }
}