/* ==========================================================================
   Forensics Index — global system
   Palette, type scale, header/footer, bands, shared editorial components.
   ========================================================================== */

:root {
  --max-width: 1160px;

  --bg-void: #08090c;
  --bg-deep: #0d1015;
  --bg-surface: #12151c;
  --bg-raised: #191d26;
  --bg-paper: #f6f6f8;
  --bg-paper-raised: #ffffff;

  --ink: #0c0d11;
  --ink-soft: #454b5a;
  --ink-faint: #737a8c;
  --line-paper: #e2e3e9;

  --snow: #f7f8fb;
  --snow-soft: #a7aebf;
  --snow-faint: #757d90;
  --line-void: rgba(255, 255, 255, .11);

  --accent: #2b6df6;
  --accent-bright: #4d86ff;
  --accent-soft: #6e8cff;
  --accent-wash: rgba(43, 109, 246, .12);
  --signal: #12c99b;
  --signal-wash: rgba(18, 201, 155, .13);
  --warn: #ff5a45;
  --warn-wash: rgba(255, 90, 69, .12);

  --radius-sm: 10px;
  --radius: 18px;
  --radius-lg: 28px;

  --shadow-panel: 0 24px 60px -30px rgba(8, 9, 12, .65), 0 2px 6px -2px rgba(8, 9, 12, .3);
  --shadow-float: 0 40px 90px -45px rgba(12, 22, 60, .6);

  --font-display: 'Archivo', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Public Sans', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --step: clamp(3.5rem, 7vw, 6rem);
  --ease: cubic-bezier(.22, .61, .36, 1);
}

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

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

body {
  margin: 0;
  background: var(--bg-void);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img, svg, video { max-width: 100%; }
img { border-style: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -.03em;
  text-transform: uppercase;
  margin: 0 0 .6em;
  text-wrap: balance;
}

h1 { font-size: clamp(2.5rem, 6.4vw, 4.75rem); }
h2 { font-size: clamp(1.9rem, 3.9vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2.1vw, 1.6rem); letter-spacing: -.02em; }
h4 { font-size: 1.0625rem; letter-spacing: .02em; }

p { margin: 0 0 1.15em; }
p:last-child { margin-bottom: 0; }

a { color: inherit; }

strong { font-weight: 700; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.container--narrow > * { max-width: 820px; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: 1rem; top: -4rem;
  z-index: 60;
  padding: .7rem 1.1rem;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top .18s var(--ease);
}
.skip-link:focus-visible { top: 1rem; }

:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 3px;
  border-radius: 4px;
}

/* --------------------------------------------------------------- bands -- */

.band { position: relative; padding: var(--step) 0; }
.band--void { background: var(--bg-void); color: var(--snow); }
.band--deep { background: var(--bg-deep); color: var(--snow); }
.band--paper { background: var(--bg-paper); color: var(--ink); }

.band--void h1, .band--void h2, .band--void h3, .band--void h4,
.band--deep h1, .band--deep h2, .band--deep h3, .band--deep h4 { color: #fff; }

/* Grain + light bloom give the dark bands depth instead of flat black. */
.band--void::before, .band--deep::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .045;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}
.band > .container { position: relative; z-index: 1; }

.band--tight { padding: calc(var(--step) * .62) 0; }

/* --------------------------------------------------------------- header -- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(8, 9, 12, .86);
  backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--line-void);
}
.site-header .container {
  height: 64px;
  display: flex;
  align-items: center;
  gap: 1.25rem;
}
.site-logo { display: inline-flex; align-items: center; text-decoration: none; margin-right: auto; }
.site-logo__img { height: 52px; width: auto; display: block; }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px; height: 38px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line-void);
  border-radius: var(--radius-sm);
  color: var(--snow);
  cursor: pointer;
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}
.nav-toggle:hover { border-color: rgba(255, 255, 255, .3); background: rgba(255, 255, 255, .05); }
.nav-toggle__bars { display: block; width: 17px; height: 11px; position: relative; }
.nav-toggle__bars::before,
.nav-toggle__bars::after,
.nav-toggle__bars span {
  content: '';
  position: absolute;
  left: 0; right: 0;
  height: 1.6px;
  background: currentColor;
  border-radius: 2px;
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}
.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars span { top: 4.7px; }
.nav-toggle__bars::after { bottom: 0; }
.nav-toggle[aria-expanded='true'] .nav-toggle__bars::before { transform: translateY(4.7px) rotate(45deg); }
.nav-toggle[aria-expanded='true'] .nav-toggle__bars span { opacity: 0; }
.nav-toggle[aria-expanded='true'] .nav-toggle__bars::after { transform: translateY(-4.7px) rotate(-45deg); }

.site-nav {
  display: none;
  position: absolute;
  top: 64px; left: 0; right: 0;
  background: rgba(10, 12, 16, .98);
  border-bottom: 1px solid var(--line-void);
  padding: .75rem 1.5rem 1.35rem;
}
.site-nav.is-open { display: block; }
.site-nav ul {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-direction: column;
  gap: .15rem;
}
.site-nav a {
  display: block;
  padding: .6rem 0;
  color: var(--snow-soft);
  text-decoration: none;
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .09em;
  text-transform: uppercase;
  border-bottom: 1px solid rgba(255, 255, 255, .05);
  transition: color .16s var(--ease);
}
.site-nav a:hover { color: #fff; }
.site-nav a.active { color: var(--accent-bright); }

.site-nav__cta a {
  font-size: .7rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: .5rem 1rem;
  color: #fff;
  background: var(--accent);
  transition: background-color .18s var(--ease), border-color .18s var(--ease);
}
.site-nav__cta a:hover { background: var(--accent-bright); border-color: var(--accent-bright); color: #fff; }
.site-nav__cta a.active::after { display: none; }

/* --------------------------------------------------------------- footer -- */

.site-footer {
  background: var(--bg-paper);
  color: var(--ink-soft);
  padding: 4rem 0 2.5rem;
  font-size: .9375rem;
}
.site-footer__top {
  display: grid;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--line-paper);
}
.site-footer__brand p { margin-top: 1rem; max-width: 34ch; color: var(--ink-faint); font-size: .9rem; }
.site-footer__logo { height: 52px; width: auto; display: block; }
.site-footer h4 {
  font-size: .75rem;
  letter-spacing: .14em;
  color: var(--ink);
  margin-bottom: 1rem;
}
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .55rem; }
.site-footer a { color: var(--ink-soft); text-decoration: none; transition: color .16s var(--ease); }
.site-footer a:hover { color: var(--accent); }
.site-footer__legal {
  padding-top: 1.75rem;
  display: grid;
  gap: .75rem;
  font-size: .8125rem;
  color: var(--ink-faint);
}
.site-footer__legal p { margin: 0; }

/* ----------------------------------------------------------- components -- */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent-bright);
  margin: 0 0 1.25rem;
}
.eyebrow::before {
  content: '';
  width: 26px; height: 1px;
  background: currentColor;
  opacity: .6;
}
.band--paper .eyebrow { color: var(--accent); }

.lede {
  font-size: clamp(1.0625rem, 1.5vw, 1.25rem);
  line-height: 1.6;
  color: var(--snow-soft);
  max-width: 62ch;
}
.band--paper .lede { color: var(--ink-soft); }

.prose { max-width: 68ch; }
.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: .18em;
  transition: color .16s var(--ease);
}
.band--void .prose a, .band--deep .prose a { color: var(--accent-bright); }
.prose a:hover { color: var(--accent-soft); }
.band--void .prose, .band--deep .prose { color: var(--snow-soft); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .8rem 1.35rem;
  border-radius: 999px;
  font-size: .875rem;
  font-weight: 600;
  letter-spacing: .02em;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-bright); }
.btn--ghost { border-color: var(--line-void); color: var(--snow); }
.btn--ghost:hover { border-color: rgba(255, 255, 255, .34); background: rgba(255, 255, 255, .05); }
.band--paper .btn--ghost { border-color: #d3d5de; color: var(--ink); }
.band--paper .btn--ghost:hover { border-color: var(--accent); color: var(--accent); background: transparent; }
.btn__arrow { width: 14px; height: 14px; flex: none; }

.callout {
  position: relative;
  border-radius: var(--radius);
  padding: 1.6rem 1.75rem;
  background: var(--bg-surface);
  border: 1px solid var(--line-void);
  color: var(--snow-soft);
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 1.1rem;
  align-items: start;
}
.band--paper .callout {
  background: var(--bg-paper-raised);
  border-color: var(--line-paper);
  color: var(--ink-soft);
  box-shadow: 0 18px 40px -34px rgba(12, 13, 17, .5);
}
.callout__icon { width: 28px; height: 28px; color: var(--accent-bright); flex: none; }
.band--paper .callout__icon { color: var(--accent); }
.callout strong { color: #fff; }
.band--paper .callout strong { color: var(--ink); }
.callout ul { margin: .75rem 0 0; padding-left: 1.1rem; display: grid; gap: .4rem; }
.callout--warn { border-color: rgba(255, 90, 69, .38); background: linear-gradient(180deg, var(--warn-wash), transparent 70%), var(--bg-surface); }
.callout--warn .callout__icon { color: var(--warn); }
.band--paper .callout--warn { background: linear-gradient(180deg, var(--warn-wash), #fff 70%); border-color: rgba(255, 90, 69, .3); }
.callout--note { border-color: rgba(43, 109, 246, .35); background: linear-gradient(180deg, var(--accent-wash), transparent 70%), var(--bg-surface); }
.band--paper .callout--note { background: linear-gradient(180deg, var(--accent-wash), #fff 70%); border-color: rgba(43, 109, 246, .26); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-family: var(--font-mono);
  font-size: .6875rem;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: .32rem .6rem;
  border-radius: 6px;
  border: 1px solid var(--line-void);
  color: var(--snow-soft);
  white-space: nowrap;
}
.band--paper .chip { border-color: var(--line-paper); color: var(--ink-soft); background: #fff; }
.chip--tool { color: var(--accent-bright); border-color: rgba(43, 109, 246, .4); background: var(--accent-wash); }
.chip--service { color: var(--signal); border-color: rgba(18, 201, 155, .38); background: var(--signal-wash); }
.band--paper .chip--tool { color: var(--accent); }
.band--paper .chip--service { color: #0a8f6d; }

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--line-void);
  background: var(--bg-surface);
  -webkit-overflow-scrolling: touch;
}
.band--paper .table-wrap { border-color: var(--line-paper); background: #fff; }

table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: .9375rem;
  min-width: 720px;
}
table.data th, table.data td {
  text-align: left;
  padding: .95rem 1rem;
  border-bottom: 1px solid var(--line-void);
  vertical-align: top;
}
.band--paper table.data th, .band--paper table.data td { border-bottom-color: var(--line-paper); }
table.data thead th {
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--snow-faint);
  font-weight: 500;
  background: rgba(255, 255, 255, .02);
  white-space: nowrap;
}
.band--paper table.data thead th { color: var(--ink-faint); background: #fbfbfd; }
table.data tbody tr:last-child td { border-bottom: none; }
table.data tbody tr { transition: background-color .16s var(--ease); }
table.data tbody tr:hover { background: rgba(255, 255, 255, .025); }
.band--paper table.data tbody tr:hover { background: #fafafc; }
table.data td { color: var(--snow-soft); }
.band--paper table.data td { color: var(--ink-soft); }
table.data td strong, table.data th strong { color: #fff; font-weight: 600; }
.band--paper table.data td strong { color: var(--ink); }

/* FAQ — no JS, native disclosure. */
.faq { display: grid; gap: .75rem; max-width: 900px; }
.faq details {
  border: 1px solid var(--line-void);
  border-radius: var(--radius);
  background: var(--bg-surface);
  overflow: hidden;
  transition: border-color .18s var(--ease);
}
.band--paper .faq details { border-color: var(--line-paper); background: #fff; }
.faq details[open] { border-color: rgba(43, 109, 246, .42); }
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 1.15rem 3.25rem 1.15rem 1.5rem;
  position: relative;
  font-weight: 600;
  font-size: 1.0625rem;
  color: #fff;
}
.band--paper .faq summary { color: var(--ink); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: '';
  position: absolute;
  right: 1.5rem; top: 1.5rem;
  width: 11px; height: 11px;
  border-right: 1.6px solid var(--accent-bright);
  border-bottom: 1.6px solid var(--accent-bright);
  transform: rotate(45deg);
  transition: transform .2s var(--ease);
}
.faq details[open] summary::after { transform: rotate(-135deg) translate(-3px, -3px); }
.faq details > p, .faq details > ul {
  margin: 0;
  padding: 0 3.25rem 1.4rem 1.5rem;
  color: var(--snow-soft);
}
.band--paper .faq details > p { color: var(--ink-soft); }

.section-head { max-width: 760px; margin-bottom: 2.75rem; }
.section-head p { color: var(--snow-soft); }
.band--paper .section-head p { color: var(--ink-soft); }

.mono { font-family: var(--font-mono); font-size: .85em; letter-spacing: .02em; }

.divider-note {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--snow-faint);
}
.band--paper .divider-note { color: var(--ink-faint); }

/* Staggered entrance on the first screen only. */
@media (prefers-reduced-motion: no-preference) {
  .reveal { animation: rise .7s var(--ease) both; }
  .reveal:nth-child(2) { animation-delay: .07s; }
  .reveal:nth-child(3) { animation-delay: .14s; }
  .reveal:nth-child(4) { animation-delay: .21s; }
  @keyframes rise {
    from { opacity: 0; transform: translateY(14px); }
    to { opacity: 1; transform: none; }
  }
}

/* ------------------------------------------------------------- desktop -- */

@media (min-width: 880px) {
  .nav-toggle { display: none; }
  .site-nav {
    display: block;
    position: static;
    background: none;
    border: none;
    padding: 0;
  }
  .site-nav ul { flex-direction: row; align-items: center; gap: 1.75rem; }
  .site-nav a { padding: 0; border-bottom: none; font-size: .75rem; letter-spacing: .1em; white-space: nowrap; }
  .site-nav__cta a { padding: .48rem .95rem; }
  .site-nav ul { gap: 1.4rem; }
  .site-nav a.active { position: relative; }
  .site-nav a.active::after {
    content: '';
    position: absolute;
    left: 0; right: 0; bottom: -22px;
    height: 2px;
    background: var(--accent-bright);
  }
  .site-footer__top { grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 3rem; }
  .site-footer__legal { grid-template-columns: 1fr auto; align-items: center; }
}

/* --------------------------------------------------- shared page blocks -- */

.split { display: grid; gap: 2.5rem; align-items: start; }

.section-cta { margin-top: 2.5rem; }

.panel-cta {
  position: relative;
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 4vw, 3.25rem);
  color: #fff;
  background:
    radial-gradient(120% 140% at 12% 0%, rgba(110, 140, 255, .95) 0%, rgba(43, 109, 246, .92) 42%, rgba(19, 46, 122, .96) 100%),
    var(--accent);
  box-shadow: var(--shadow-float);
  display: grid;
  gap: 1.75rem;
  overflow: hidden;
}
.panel-cta::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: .09;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}
.panel-cta > * { position: relative; z-index: 1; }
.panel-cta h2 { color: #fff; margin-bottom: .5rem; }
.panel-cta p { color: rgba(255, 255, 255, .86); max-width: 58ch; }
.panel-cta__actions { display: flex; flex-wrap: wrap; gap: .75rem; margin: 0; }
.panel-cta .btn--primary { background: #fff; color: #10224a; }
.panel-cta .btn--primary:hover { background: #eef2ff; }
.panel-cta .btn--ghost { border-color: rgba(255, 255, 255, .45); color: #fff; }
.panel-cta .btn--ghost:hover { border-color: #fff; background: rgba(255, 255, 255, .12); color: #fff; }

.closing { margin: 3rem auto 0; max-width: 62ch; color: var(--ink-soft); }
.band--void .closing, .band--deep .closing { color: var(--snow-soft); }

@media (min-width: 900px) {
  .split { grid-template-columns: 1.15fr .85fr; gap: 3.5rem; }
  .split--wide { grid-template-columns: 1fr 1fr; }
  .panel-cta { grid-template-columns: 1.5fr auto; align-items: center; gap: 3rem; }
}