/* ==========================================================================
   Brillux Labs — design system
   Palette and type derived from the subject: DMARC's three real policy
   states (none / quarantine / reject) become the accent triad; DNS records
   render in monospace because that's genuinely how they're rendered.
   ========================================================================== */

:root {
  /* ---- color ---- */
  --ink: #12142b;
  --ink-soft: #4a4d6b;
  --ink-faint: #5f6280; /* darkened from initial pass — #8083a0 measured 3.4:1 on paper, below the 4.5:1 small-text minimum */
  --paper: #f5f6f5;
  --paper-raised: #ffffff;
  --paper-dim: #ebedec;
  --line: #dbdfe3;
  --line-soft: #e6e9eb;
  --line-strong: #7c88a0; /* for input/button borders — meets the 3:1 non-text contrast guideline; --line stays soft for decorative dividers */

  --state-none: #96a0b2;
  --state-none-soft: #edeff2;
  --state-quarantine: #a8690f;
  --state-quarantine-ink: #7a4d0c;
  --state-quarantine-soft: #fbf0de;
  --state-reject: #0f5f4f;
  --state-reject-bright: #12705e;
  --state-reject-soft: #e2f0ec;

  --white: #ffffff;

  /* ---- type ---- */
  --font-display: "Archivo", "Arial Narrow", sans-serif;
  --font-body: "IBM Plex Sans", -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --fs-h1: clamp(2.35rem, 1.9rem + 2vw, 3.75rem);
  --fs-h2: clamp(1.7rem, 1.45rem + 1.1vw, 2.5rem);
  --fs-h3: clamp(1.2rem, 1.08rem + 0.5vw, 1.45rem);
  --fs-lede: clamp(1.1rem, 1rem + 0.4vw, 1.3rem);
  --fs-body: 1.0625rem;
  --fs-small: 0.9rem;
  --fs-label: 0.78rem;

  /* ---- space ---- */
  --space-3xs: 0.25rem;
  --space-2xs: 0.5rem;
  --space-xs: 0.75rem;
  --space-sm: 1.25rem;
  --space-md: 2rem;
  --space-lg: 3rem;
  --space-xl: 4.5rem;
  --space-2xl: 6.5rem;

  --radius-sm: 6px;
  --radius-md: 10px;
  --container: 1160px;
  --shadow-card: 0 1px 2px rgba(18, 20, 43, 0.04), 0 12px 28px -18px rgba(18, 20, 43, 0.18);
}

/* ---- reset ---- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; line-height: 1.12; margin: 0 0 0.5em; letter-spacing: -0.01em; color: var(--ink); }
h1 { font-size: var(--fs-h1); font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
p { margin: 0 0 1em; color: var(--ink-soft); }
a { color: inherit; }
ul, ol { padding: 0; margin: 0; list-style: none; }
button { font: inherit; }

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, summary:focus-visible {
  outline: 2px solid var(--state-reject-bright);
  outline-offset: 3px;
  border-radius: 3px;
}

.mono { font-family: var(--font-mono); }
.container { max-width: var(--container); margin-inline: auto; padding-inline: var(--space-sm); }
@media (min-width: 640px) { .container { padding-inline: var(--space-md); } }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--state-reject);
  font-weight: 500;
  margin-bottom: var(--space-xs);
}
.eyebrow::before {
  content: "";
  width: 0.55em;
  height: 0.55em;
  border-radius: 50%;
  background: var(--state-reject-bright);
  display: inline-block;
}

.lede { font-size: var(--fs-lede); color: var(--ink-soft); max-width: 46ch; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: 1rem; top: -3rem; background: var(--ink); color: var(--white);
  padding: 0.6rem 1rem; border-radius: var(--radius-sm); z-index: 200; transition: top 0.15s ease;
  font-family: var(--font-mono); font-size: var(--fs-small);
}
.skip-link:focus { top: 1rem; }

/* ---- buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.85em 1.4em;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.btn-primary { background: var(--state-reject-bright); color: var(--white); }
.btn-primary:hover { background: var(--state-reject); transform: translateY(-1px); }
.btn-secondary { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-secondary:hover { border-color: var(--ink); transform: translateY(-1px); }
.btn-ghost-light { background: transparent; color: var(--white); border-color: rgba(255,255,255,0.3); }
.btn-ghost-light:hover { border-color: var(--white); }
.btn[disabled] { opacity: 0.6; cursor: not-allowed; transform: none; }
.btn-block { width: 100%; justify-content: center; }

/* ==========================================================================
   Nav
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245, 246, 245, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-xs);
  gap: var(--space-sm);
}
.nav__brand {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  white-space: nowrap;
}
.nav__brand-mark {
  width: 1.6em; height: 1.6em;
  border-radius: 4px;
  background: var(--ink);
  color: var(--paper);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 0.8em;
  font-weight: 700;
}
.nav__links {
  display: none;
  align-items: center;
  gap: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.nav__links a { text-decoration: none; color: var(--ink-soft); padding: 0.3em 0; border-bottom: 1px solid transparent; }
.nav__links a:hover, .nav__links a[aria-current="page"] { color: var(--ink); border-color: var(--state-reject-bright); }
.nav__actions { display: flex; align-items: center; gap: var(--space-sm); }
.nav__cta { display: none; }
.nav__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4em; height: 2.4em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--paper-raised);
  cursor: pointer;
}
.nav__toggle-icon, .nav__toggle-icon::before, .nav__toggle-icon::after {
  width: 1.1em; height: 2px; background: var(--ink); display: block; position: relative; transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav__toggle-icon::before, .nav__toggle-icon::after { content: ""; position: absolute; left: 0; }
.nav__toggle-icon::before { top: -6px; }
.nav__toggle-icon::after { top: 6px; }
.nav__toggle[aria-expanded="true"] .nav__toggle-icon { background: transparent; }
.nav__toggle[aria-expanded="true"] .nav__toggle-icon::before { transform: translateY(6px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] .nav__toggle-icon::after { transform: translateY(-6px) rotate(-45deg); }

.nav__mobile {
  display: none;
  flex-direction: column;
  gap: 0.2em;
  padding: var(--space-xs) 0 var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  border-top: 1px solid var(--line);
  margin-top: var(--space-xs);
}
.nav__mobile a { text-decoration: none; color: var(--ink); padding: 0.85em 0.2em; border-bottom: 1px solid var(--line-soft); }
.nav__mobile[data-open="true"] { display: flex; }
.nav__mobile .btn { margin-top: var(--space-xs); }

@media (min-width: 900px) {
  .nav__links { display: flex; }
  .nav__cta { display: inline-flex; }
  .nav__toggle { display: none; }
  .nav__mobile { display: none !important; }
}

/* ==========================================================================
   Sections & layout
   ========================================================================== */
.section { padding-block: var(--space-2xl); }
.section-tight { padding-block: var(--space-xl); }
.section-alt { background: var(--paper-dim); }
.section-ink { background: var(--ink); color: var(--paper); }
.section-ink h2, .section-ink h3 { color: var(--white); }
.section-ink p { color: rgba(245, 246, 245, 0.72); }
.section-head { max-width: 62ch; margin-bottom: var(--space-lg); }
.section-head--center { margin-inline: auto; text-align: center; }

.grid-2 { display: grid; gap: var(--space-md); }
@media (min-width: 800px) { .grid-2 { grid-template-columns: 1fr 1fr; align-items: start; } }
.grid-3 { display: grid; gap: var(--space-md); }
@media (min-width: 800px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } }

.hr { border: none; border-top: 1px solid var(--line); margin: var(--space-lg) 0; }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  padding-block: var(--space-xl) var(--space-2xl);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, black, transparent 70%);
  opacity: 0.5;
  pointer-events: none;
}
.hero__inner { position: relative; display: grid; gap: var(--space-xl); }
.hero__copy { max-width: 40rem; }
.hero__title { margin-bottom: var(--space-sm); }
.hero__title .accent { color: var(--state-reject-bright); }
@media (min-width: 1000px) {
  .hero__inner { grid-template-columns: 1.05fr 0.95fr; align-items: center; gap: var(--space-lg); }
}

.path-cards { display: grid; gap: var(--space-sm); margin-top: var(--space-lg); }
@media (min-width: 560px) { .path-cards { grid-template-columns: 1fr 1fr; } }
.path-card {
  display: block;
  text-decoration: none;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
.path-card:hover { border-color: var(--state-reject-bright); transform: translateY(-2px); box-shadow: var(--shadow-card); }
.path-card__eyebrow { font-family: var(--font-mono); font-size: var(--fs-label); letter-spacing: 0.08em; color: var(--ink-faint); text-transform: uppercase; }
.path-card h3 { margin-top: 0.4em; margin-bottom: 0.35em; }
.path-card p { font-size: var(--fs-small); margin-bottom: 0.9em; }
.path-card__go { font-family: var(--font-mono); font-size: var(--fs-small); font-weight: 500; color: var(--state-reject-bright); }

/* ==========================================================================
   Record / terminal panel — the signature element
   ========================================================================== */
.record-panel {
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius-md);
  overflow: hidden;
  font-family: var(--font-mono);
  box-shadow: 0 24px 60px -24px rgba(18, 20, 43, 0.45);
}
.record-panel__head {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.85em 1.1em;
  border-bottom: 1px solid rgba(245, 246, 245, 0.1);
  background: rgba(255,255,255,0.03);
}
.record-panel__dots { display: inline-flex; gap: 0.35em; }
.record-panel__dots span { width: 0.6em; height: 0.6em; border-radius: 50%; background: rgba(245,246,245,0.22); display: block; }
.record-panel__label { font-size: 0.8rem; color: rgba(245,246,245,0.55); }
.record-panel__body {
  margin: 0;
  padding: 1.2em 1.1em;
  font-size: 0.86rem;
  line-height: 1.7;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.record-panel__body .k { color: #8ecab8; }
.record-panel__body .v { color: #f2c98a; }
.record-panel__body .muted { color: rgba(245,246,245,0.4); }
.record-panel__note {
  display: flex;
  gap: 0.7em;
  align-items: flex-start;
  padding: 1em 1.1em 1.2em;
  font-family: var(--font-body);
  font-size: 0.92rem;
  color: rgba(245, 246, 245, 0.82);
  border-top: 1px solid rgba(245, 246, 245, 0.08);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  padding: 0.3em 0.65em;
  border-radius: 999px;
  white-space: nowrap;
}
.badge::before { content: ""; width: 0.5em; height: 0.5em; border-radius: 50%; }
.badge--none { background: var(--state-none-soft); color: #4d5568; }
.badge--none::before { background: var(--state-none); }
.badge--quarantine { background: var(--state-quarantine-soft); color: var(--state-quarantine-ink); }
.badge--quarantine::before { background: var(--state-quarantine); }
.badge--reject { background: var(--state-reject-soft); color: var(--state-reject); }
.badge--reject::before { background: var(--state-reject-bright); }
.badge--dark { background: rgba(255,255,255,0.1); color: var(--paper); }
.badge--dark::before { background: var(--paper); }

/* ==========================================================================
   Cards & content blocks
   ========================================================================== */
.card {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}
.card--flush { padding: 0; overflow: hidden; }

.example-block {
  border: 1px dashed var(--line);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--paper-dim);
}
.example-block__tag {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  display: inline-block;
  margin-bottom: 0.6em;
}

.fact-strip {
  display: grid;
  gap: var(--space-md);
  padding-block: var(--space-lg);
}
@media (min-width: 780px) { .fact-strip { grid-template-columns: repeat(3, 1fr); } }
.fact-strip__item { border-top: 2px solid var(--state-reject-bright); padding-top: var(--space-xs); }
.fact-strip__num { font-family: var(--font-display); font-weight: 800; font-size: 1.9rem; display: block; margin-bottom: 0.15em; }

.compare {
  display: grid;
  gap: var(--space-md);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}
@media (min-width: 760px) { .compare { grid-template-columns: 1fr 1fr; gap: 0; } }
.compare__col { padding: var(--space-md); }
.compare__col + .compare__col { border-top: 1px solid var(--line); }
@media (min-width: 760px) { .compare__col + .compare__col { border-top: none; border-left: 1px solid var(--line); } }
.compare__col--dash { background: var(--paper-dim); }
.compare__list { display: flex; flex-direction: column; gap: 0.6em; margin-top: var(--space-xs); }
.compare__list li { font-size: var(--fs-small); color: var(--ink-soft); padding-left: 1.3em; position: relative; }
.compare__list li::before { content: "—"; position: absolute; left: 0; color: var(--ink-faint); }

/* ---- rollout stages (how-it-works) ---- */
.rollout { display: flex; flex-direction: column; gap: 0; }
.rollout__stage {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-md);
  padding-block: var(--space-md);
  border-top: 1px solid var(--line);
}
.rollout__stage:last-child { border-bottom: 1px solid var(--line); }
.rollout__index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-faint);
  padding-top: 0.3em;
}
.rollout__stage h3 { margin-bottom: 0.3em; }
.rollout__record {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-soft);
  background: var(--paper-dim);
  border-radius: var(--radius-sm);
  padding: 0.6em 0.8em;
  margin: 0.7em 0;
  display: inline-block;
}

/* ==========================================================================
   Audit checker
   ========================================================================== */
.checker {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  box-shadow: var(--shadow-card);
}
.checker__form { display: flex; flex-direction: column; gap: 0.7em; }
@media (min-width: 560px) { .checker__form { flex-direction: row; } }
.checker__input {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 1rem;
  padding: 0.85em 1em;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--paper);
  color: var(--ink);
}
.checker__input:focus-visible { outline: 2px solid var(--state-reject-bright); outline-offset: 2px; }
.checker__hint { font-size: var(--fs-small); color: var(--ink-faint); margin-top: 0.6em; }
.checker__status { font-family: var(--font-mono); font-size: var(--fs-small); color: var(--ink-faint); min-height: 1.4em; margin-top: 0.9em; }
.checker__results { margin-top: var(--space-md); display: none; flex-direction: column; gap: var(--space-sm); }
.checker__results[data-visible="true"] { display: flex; }
.checker__result-row {
  display: flex;
  gap: var(--space-xs);
  align-items: flex-start;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
}
.checker__result-icon { font-family: var(--font-mono); font-size: 1.1rem; line-height: 1.4; }
.checker__result-body h4 { font-family: var(--font-body); font-weight: 600; font-size: 1rem; margin-bottom: 0.25em; }
.checker__result-body p { font-size: var(--fs-small); margin-bottom: 0.5em; }
.checker__record-text {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--paper-dim);
  border-radius: var(--radius-sm);
  padding: 0.6em 0.75em;
  margin-top: 0.5em;
  word-break: break-word;
  color: var(--ink);
}
.checker__cta { margin-top: var(--space-sm); padding-top: var(--space-sm); border-top: 1px solid var(--line); }

/* ==========================================================================
   Forms (contact)
   ========================================================================== */
.form-field { display: flex; flex-direction: column; gap: 0.4em; margin-bottom: var(--space-sm); }
.form-field label { font-family: var(--font-mono); font-size: var(--fs-small); color: var(--ink-soft); }
.form-field input, .form-field textarea, .form-field select {
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.8em 0.9em;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--paper-raised);
  color: var(--ink);
}
.form-field textarea { resize: vertical; min-height: 8em; }
.form-note { font-size: var(--fs-small); color: var(--ink-faint); margin-top: var(--space-xs); }

/* ==========================================================================
   Email block (contact prominence)
   ========================================================================== */
.email-block {
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-md);
  text-align: center;
}
.email-block__label { font-family: var(--font-mono); font-size: var(--fs-label); letter-spacing: 0.08em; text-transform: uppercase; color: rgba(245,246,245,0.55); }
.email-block__address {
  display: inline-block;
  margin-block: 0.4em var(--space-sm);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.4rem, 1.1rem + 1.5vw, 2.2rem);
  color: var(--white);
  text-decoration: none;
  word-break: break-word;
}
.email-block__address:hover { color: var(--state-reject-soft); }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer { background: var(--ink); color: rgba(245,246,245,0.7); padding-block: var(--space-xl) var(--space-lg); }
.footer__grid { display: grid; gap: var(--space-lg); }
@media (min-width: 760px) { .footer__grid { grid-template-columns: 1.3fr 1fr 1fr 1fr; } }
.footer__brand { font-family: var(--font-mono); font-weight: 600; color: var(--white); font-size: 1rem; margin-bottom: 0.6em; display: block; text-decoration: none; }
.footer__desc { font-size: var(--fs-small); max-width: 32ch; color: rgba(245,246,245,0.55); }
.footer__col h4 { font-family: var(--font-mono); font-size: var(--fs-label); text-transform: uppercase; letter-spacing: 0.08em; color: rgba(245,246,245,0.45); margin-bottom: 0.9em; font-weight: 500; }
.footer__col ul { display: flex; flex-direction: column; gap: 0.6em; }
.footer__col a { color: rgba(245,246,245,0.75); text-decoration: none; font-size: var(--fs-small); }
.footer__col a:hover { color: var(--white); }
.footer__bottom {
  margin-top: var(--space-xl);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(245,246,245,0.12);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: rgba(245,246,245,0.4);
}

/* ==========================================================================
   Scroll reveal
   ========================================================================== */
[data-reveal] { opacity: 0; transform: translateY(14px); transition: opacity 0.6s ease, transform 0.6s ease; }
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* ==========================================================================
   Page-level heading blocks (about/legal)
   ========================================================================== */
.page-hero { padding-block: var(--space-xl) var(--space-lg); border-bottom: 1px solid var(--line); }
.prose { max-width: 68ch; }
.prose h2 { margin-top: var(--space-lg); }
.prose h3 { margin-top: var(--space-md); }
.prose ul, .prose ol { list-style: disc; padding-left: 1.3em; margin-bottom: 1em; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: 0.5em; color: var(--ink-soft); }
.prose strong { color: var(--ink); }
.updated-tag { font-family: var(--font-mono); font-size: var(--fs-small); color: var(--ink-faint); }

.callout {
  border-left: 3px solid var(--state-reject-bright);
  background: var(--paper-dim);
  padding: var(--space-sm) var(--space-md);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-block: var(--space-md);
}
.callout p:last-child { margin-bottom: 0; }