/* ===========================================================
   Kinexar Bio — design tokens + components
   Nexus token structure, overridden with a navy / electric-teal
   biodefense palette. Dark mode is the default.
   =========================================================== */

:root {
  /* Type scale (fluid) */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1rem + 0.6vw, 1.375rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 4.5rem);

  /* Spacing (4px system) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-14: 3.5rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.4rem;
  --radius-lg: 0.625rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 660px;
  --content-default: 980px;
  --content-wide: 1220px;

  /* Fonts */
  --font-display: 'DM Sans', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', Menlo, monospace;
}

/* ---------- Dark (default) ---------- */
:root,
[data-theme='dark'] {
  --color-bg: #050b17;
  --color-surface: #0a1425;
  --color-surface-2: #0e1b30;
  --color-surface-offset: #0c1729;
  --color-divider: #14243c;
  --color-border: #1c2f4c;

  --color-text: #edf3fa;
  --color-text-muted: #9db0c9;
  --color-text-faint: #637793;
  --color-text-inverse: #050b17;

  --color-primary: #2fe3d3;
  --color-primary-hover: #62efe2;
  --color-primary-active: #16bdb0;
  --color-primary-highlight: #0d2b32;

  --color-success: #5fbf7f;
  --color-glow: 0 0 0 1px color-mix(in oklab, var(--color-primary) 30%, transparent);

  --shadow-sm: 0 1px 2px rgb(0 0 0 / 0.4);
  --shadow-md: 0 8px 24px rgb(0 0 0 / 0.45);
  --shadow-lg: 0 24px 60px rgb(0 0 0 / 0.55);

  --grid-line: color-mix(in oklab, var(--color-primary) 9%, transparent);
  color-scheme: dark;
}

/* ---------- Light ---------- */
[data-theme='light'] {
  --color-bg: #f4f7fb;
  --color-surface: #ffffff;
  --color-surface-2: #eef3f9;
  --color-surface-offset: #e8eef6;
  --color-divider: #dce5ef;
  --color-border: #c9d6e5;

  --color-text: #08182c;
  --color-text-muted: #4a5f7a;
  --color-text-faint: #8397ae;
  --color-text-inverse: #ffffff;

  --color-primary: #05707a;
  --color-primary-hover: #045a63;
  --color-primary-active: #033f46;
  --color-primary-highlight: #d6ebed;

  --color-success: #2f7d4c;

  --shadow-sm: 0 1px 2px rgb(8 24 44 / 0.06);
  --shadow-md: 0 8px 24px rgb(8 24 44 / 0.09);
  --shadow-lg: 0 24px 60px rgb(8 24 44 / 0.12);

  --grid-line: color-mix(in oklab, var(--color-primary) 12%, transparent);
  color-scheme: light;
}

/* ===================== Layout primitives ===================== */

.wrap {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
.wrap--default { max-width: var(--content-default); }
.wrap--narrow { max-width: var(--content-narrow); }

section { position: relative; }

.section {
  padding-block: clamp(var(--space-14, 3.5rem), 7vw, var(--space-24));
}
.section--tight { padding-block: clamp(var(--space-12), 6vw, var(--space-20)); }
.section--alt { background: var(--color-surface); border-block: 1px solid var(--color-divider); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-5);
}
.eyebrow::before {
  content: '';
  width: 22px;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}

.lede {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 60ch;
  line-height: 1.55;
}
.muted { color: var(--color-text-muted); }
.small { font-size: var(--text-sm); color: var(--color-text-muted); }

h2.section-title { font-size: var(--text-xl); }
h3 { font-size: var(--text-lg); }

/* ===================== Header / nav ===================== */

.header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: color-mix(in oklab, var(--color-bg) 82%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: border-color 240ms ease, background 240ms ease;
}
.header.is-scrolled {
  border-bottom-color: var(--color-divider);
  background: color-mix(in oklab, var(--color-bg) 92%, transparent);
}
.header__inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  margin-right: auto;
}
.brand__mark { color: var(--color-primary); flex: none; }
.brand__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  letter-spacing: -0.015em;
  line-height: 1;
}
.brand__name span { color: var(--color-primary); }
.brand__sub {
  display: block;
  font-family: var(--font-body);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-top: 3px;
}

.nav { display: flex; align-items: center; gap: var(--space-1); }
.nav a {
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
}
.nav a:hover { color: var(--color-text); background: var(--color-surface-2); }
.nav a[aria-current='page'] { color: var(--color-primary); }

.header__actions { display: flex; align-items: center; gap: var(--space-2); }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  background: transparent;
}
.icon-btn:hover { color: var(--color-primary); border-color: var(--color-primary); }

.nav-toggle { display: none; }

@media (max-width: 880px) {
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-3) var(--space-5) var(--space-6);
    box-shadow: var(--shadow-lg);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 200ms ease, transform 200ms ease;
  }
  .nav.is-open { opacity: 1; transform: none; pointer-events: auto; }
  .nav a { padding: var(--space-4) var(--space-2); font-size: var(--text-base); border-bottom: 1px solid var(--color-divider); border-radius: 0; }
  .nav-toggle { display: inline-flex; }
}

/* ===================== Buttons ===================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
  padding: var(--space-3) var(--space-6);
  min-height: 46px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
[data-theme='light'] .btn--primary { color: #ffffff; }
.btn--primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); }
.btn--ghost {
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn--ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn--block { width: 100%; }
.btn svg { flex: none; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
}
.link-arrow:hover { gap: var(--space-3); }

/* ===================== Hero ===================== */

.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(var(--space-20), 12vw, var(--space-32));
  border-bottom: 1px solid var(--color-divider);
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(120% 90% at 78% 12%, #000 0%, transparent 72%);
}
.hero__glow {
  position: absolute;
  z-index: 0;
  width: 720px;
  height: 720px;
  right: -180px;
  top: -300px;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle, color-mix(in oklab, var(--color-primary) 22%, transparent) 0%, transparent 68%);
  filter: blur(10px);
}
.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(var(--space-10), 5vw, var(--space-20));
  align-items: center;
}
.hero h1 {
  font-size: var(--text-3xl);
  max-width: 18ch;
}
.hero h1 em {
  font-style: normal;
  color: var(--color-primary);
}
.hero p {
  margin-top: var(--space-6);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 52ch;
}
.hero__cta {
  margin-top: var(--space-10);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.hero__meta {
  margin-top: var(--space-12);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-6) var(--space-8);
  max-width: 480px;
}
.hero__meta dt {
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}
.hero__meta dd {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  margin-top: var(--space-1);
}

.hero__art { position: relative; }
.hero__art svg { width: 100%; height: auto; }

/* Page header (interior pages) */
.pagehead {
  position: relative;
  overflow: hidden;
  padding-block: clamp(var(--space-16), 8vw, var(--space-24));
  border-bottom: 1px solid var(--color-divider);
  background: var(--color-surface-offset);
}
.pagehead__bg {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(100deg, #000 0%, transparent 65%);
}
.pagehead .wrap { position: relative; z-index: 1; }
.pagehead h1 { font-size: var(--text-2xl); max-width: 24ch; }
.pagehead p { margin-top: var(--space-5); }

/* ===================== Cards & grids ===================== */

.grid { display: grid; gap: var(--space-6); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(318px, 1fr)); }

.card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  overflow: hidden;
}
.card--flush { padding: 0; }
.card__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-primary);
}
.card h3 { margin-top: var(--space-4); font-size: 1.125rem; }
.card p { margin-top: var(--space-3); color: var(--color-text-muted); font-size: var(--text-sm); }
.card__icon {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: var(--radius-md);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  margin-bottom: var(--space-5);
}
.card--accent { border-color: color-mix(in oklab, var(--color-primary) 42%, var(--color-border)); }
.card--accent::after {
  content: '';
  position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(120% 100% at 100% 0%, color-mix(in oklab, var(--color-primary) 10%, transparent), transparent 60%);
}

.split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: clamp(var(--space-10), 5vw, var(--space-20));
  align-items: center;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-6);
  border-top: 1px solid var(--color-divider);
  padding-top: var(--space-8);
}
.stat__value {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--color-primary);
  line-height: 1;
}
.stat__label { margin-top: var(--space-3); font-size: var(--text-sm); color: var(--color-text-muted); }

/* Numbered steps */
.steps { display: grid; gap: 0; border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; }
.step {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: var(--space-6);
  padding: var(--space-8);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-divider);
}
.step:last-child { border-bottom: none; }
.step__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
  letter-spacing: 0.1em;
  padding-top: 4px;
}
.step h3 { font-size: 1.0625rem; }
.step p { margin-top: var(--space-2); color: var(--color-text-muted); font-size: var(--text-sm); }
@media (max-width: 560px) {
  .step { grid-template-columns: 1fr; gap: var(--space-3); padding: var(--space-6); }
}

/* ===================== Table ===================== */

.table-wrap {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  background: var(--color-surface);
}
table.pipeline { min-width: 720px; font-size: var(--text-sm); }
table.pipeline caption {
  text-align: left;
  padding: var(--space-5) var(--space-6);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  border-bottom: 1px solid var(--color-divider);
}
table.pipeline th,
table.pipeline td {
  text-align: left;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-divider);
  vertical-align: middle;
}
table.pipeline thead th {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  background: var(--color-surface-2);
}
table.pipeline tbody tr:last-child td { border-bottom: none; }
table.pipeline tbody th {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--color-primary);
  white-space: nowrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 5px var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid color-mix(in oklab, var(--color-primary) 40%, transparent);
  color: var(--color-primary);
  background: var(--color-primary-highlight);
  white-space: nowrap;
}
.badge--neutral {
  color: var(--color-text-muted);
  border-color: var(--color-border);
  background: var(--color-surface-2);
}
.badge__dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

/* Progress track for pipeline stage */
.track { display: flex; gap: 4px; margin-top: var(--space-2); }
.track span {
  height: 4px; flex: 1; border-radius: var(--radius-full);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
}
.track span.is-on { background: var(--color-primary); border-color: var(--color-primary); }

/* ===================== Team ===================== */

.person {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: var(--space-6);
  align-items: start;
}
.person__avatar {
  width: 96px; height: 96px;
  border-radius: var(--radius-lg);
  display: grid; place-items: center;
  background: linear-gradient(150deg, var(--color-surface-2), var(--color-primary-highlight));
  border: 1px solid var(--color-border);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.75rem;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}
.person__role {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-top: var(--space-2);
}
.person h3 { font-size: 1.25rem; }
.person p { margin-top: var(--space-4); font-size: var(--text-sm); color: var(--color-text-muted); }
@media (max-width: 520px) {
  .person { grid-template-columns: 1fr; }
}

/* ===================== Forms ===================== */

.form { display: grid; gap: var(--space-5); }
.field { display: grid; gap: var(--space-2); }
.field label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}
.field input,
.field textarea {
  width: 100%;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  min-height: 48px;
}
.field textarea { min-height: 148px; resize: vertical; line-height: 1.6; }
.field input::placeholder,
.field textarea::placeholder { color: var(--color-text-faint); }
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--color-primary) 18%, transparent);
}
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }
@media (max-width: 620px) { .form__row { grid-template-columns: 1fr; } }
.form__note { font-size: var(--text-xs); color: var(--color-text-faint); }

.contact-list { display: grid; gap: var(--space-6); }
.contact-list dt {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}
.contact-list dd { margin-top: var(--space-2); font-size: var(--text-base); }
.contact-list a { color: var(--color-primary); text-decoration: none; font-weight: 600; }
.contact-list a:hover { text-decoration: underline; }

/* ===================== CTA band ===================== */

.cta {
  position: relative;
  overflow: hidden;
  border: 1px solid color-mix(in oklab, var(--color-primary) 34%, var(--color-border));
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  padding: clamp(var(--space-10), 6vw, var(--space-20));
  text-align: center;
}
.cta::before {
  content: '';
  position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(80% 120% at 50% 0%, color-mix(in oklab, var(--color-primary) 14%, transparent), transparent 65%);
}
.cta > * { position: relative; }
.cta h2 { font-size: var(--text-xl); }
.cta p { margin: var(--space-5) auto 0; color: var(--color-text-muted); }
.cta .hero__cta { justify-content: center; margin-top: var(--space-8); }

/* ===================== Footer ===================== */

.footer {
  border-top: 1px solid var(--color-divider);
  background: var(--color-surface-offset);
  padding-block: var(--space-16) var(--space-8);
  margin-top: 0;
}
.footer__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-10);
}
@media (min-width: 900px) {
  .footer__grid { grid-template-columns: 1.5fr 1fr 1fr 1fr; }
}
.footer h4 {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}
.footer ul { list-style: none; display: grid; gap: var(--space-3); }
.footer a { font-size: var(--text-sm); color: var(--color-text-muted); text-decoration: none; }
.footer a:hover { color: var(--color-primary); }
.footer__bottom {
  margin-top: var(--space-12);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ===================== Motion ===================== */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms cubic-bezier(0.16, 1, 0.3, 1), transform 700ms cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}

/* Helix animation in hero art */
.helix-node { animation: pulse 3.6s ease-in-out infinite; }
@keyframes pulse {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 1; }
}

/* ===================== Responsive ===================== */

@media (max-width: 980px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__art { order: -1; max-width: 400px; margin-inline: auto; }
}
@media (max-width: 640px) {
  .wrap { padding-inline: var(--space-5); }
  .header__inner { padding-inline: var(--space-5); }
  .card { padding: var(--space-6); }
  .hero__meta { gap: var(--space-5) var(--space-6); }
  .brand__sub { display: none; }
  .footer__grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .hero__art { max-width: 300px; }
  .btn { width: 100%; }
  .hero__cta { flex-direction: column; align-items: stretch; }
  .cta .hero__cta { align-items: stretch; }
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -60px;
  z-index: 100;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  transition: top 180ms ease;
}
.skip-link:focus { top: var(--space-4); }

/* Mobile-only hint for horizontally scrollable tables */
.scroll-hint { display: none; color: var(--color-text-faint); }
@media (max-width: 760px) {
  .scroll-hint { display: block; }
}