/* Avilon marketing site — shared styles.
   Design language: sharp hairline-grid layout, type-led content, no images.
   Tokens and values are translated from design_handoff/design_handoff_avilon_site/.
   Fonts: IBM Plex Sans / IBM Plex Mono are named first but not bundled (no remote
   fonts allowed); the system stacks below are the shipped fallback. */

:root {
  --bg: #fafbfc;
  --surface: #f3f4f7;
  --ink: #10141a;
  --ink-hover: #161b23;
  --muted: #5b6472;
  --muted-strong: #3d4552;
  --faint: #8b94a3;
  --line: #e4e7ec;
  --line-strong: #d6dae1;
  --line-dark: #2b323d;
  --on-dark: #fafbfc;
  --muted-dark: #a3acba;
  --accent: oklch(0.62 0.14 25);
  --accent-dark: oklch(0.72 0.14 25);
  --error: oklch(0.5 0.18 25);
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; }

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
input, textarea { font: inherit; }

::selection { background: oklch(0.62 0.14 25 / 0.18); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
    animation-duration: 0.01ms !important;
  }
}

.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;
}

/* ---------- Layout primitives ---------- */

.wrap {
  max-width: 1240px;
  margin: 0 auto;
  padding-left: clamp(20px, 4vw, 32px);
  padding-right: clamp(20px, 4vw, 32px);
}

.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.section-label {
  margin: 0 0 28px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
}

.section-label-gap { margin: 44px 0 20px; }

.lead {
  font-size: clamp(17px, 2vw, 19px);
  line-height: 1.55;
  color: var(--muted);
  max-width: 32em;
  text-wrap: pretty;
}

/* Visible marker for unconfirmed content (brand lists, contact details). */
.tag-review {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 3px;
  padding: 2px 7px;
  white-space: nowrap;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  border: 0;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 500;
  background: none;
  text-align: center;
}

.btn-dark { background: var(--ink); color: var(--bg); }
.btn-dark:hover { background: var(--accent); }

.btn-outline { border: 1px solid var(--line-strong); color: var(--ink); }
.btn-outline:hover { border-color: var(--ink); }

.btn-quote { padding: 9px 18px; font-size: 13.5px; }
.btn-hero { padding: 13px 24px; font-size: 15px; }
.btn-cta { padding: 14px 26px; font-size: 15px; white-space: nowrap; }
.btn-submit { padding: 13px 22px; font-size: 15px; justify-self: start; }

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(250, 251, 252, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  min-height: 64px;
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 40px);
  flex-wrap: wrap;
}

.wordmark { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; }
.site-logo { display: block; width: 132px; height: 34px; object-fit: contain; }
@media (max-width: 360px) {
  .wordmark .site-logo { width: 112px; height: 29px; }
}
.wordmark-loc {
  margin-inline-start: calc(3% - 1px);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}

.site-nav { display: flex; align-items: center; gap: 24px; font-size: 14px; font-weight: 500; }
.nav-link:hover { color: var(--accent); }
.nav-link.is-active, .nav-menu-button.is-active { color: var(--accent); }

.nav-menu { position: relative; padding: 20px 0; }

.nav-menu-button {
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
}
.nav-menu-button .caret { font-size: 9px; color: var(--faint); }

.menu-panel {
  position: absolute;
  top: 100%;
  left: -20px;
  width: 620px;
  max-width: 86vw;
  border: 1px solid var(--line);
  box-shadow: 0 18px 44px -20px rgba(16, 20, 26, 0.28);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1px;
  background: var(--line);
}
.menu-panel[hidden] { display: none; }

.menu-col {
  background: var(--bg);
  padding: 22px 24px 24px;
  display: grid;
  gap: 4px;
  align-content: start;
}
.menu-col-alt { background: var(--surface); }

.menu-heading {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 10px;
}
.menu-heading-accent { color: var(--accent); }

.menu-item { display: grid; gap: 2px; padding: 8px 0; }
.menu-item:hover, .menu-item:hover .menu-item-desc { color: var(--accent); }
.menu-item-title { font-size: 15px; font-weight: 600; }
.menu-item-desc { font-size: 13px; color: var(--muted); font-weight: 400; }

.header-side { display: flex; align-items: center; gap: 14px; margin-left: auto; }

.lang {
  display: flex;
  align-items: center;
  gap: 2px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}
.lang-item { padding: 4px 6px; }
.lang-active { color: var(--accent); font-weight: 500; }
.lang-planned { color: var(--faint); }
.lang-sep { color: var(--line-strong); }

/* ---------- Home hero ---------- */

.hero-home { padding-top: clamp(72px, 11vw, 128px); padding-bottom: clamp(56px, 8vw, 88px); }
.hero-home .eyebrow { margin-bottom: 28px; }

.h1-home {
  margin: 0;
  font-size: clamp(38px, 6.4vw, 68px);
  line-height: 1.03;
  letter-spacing: -0.035em;
  font-weight: 600;
  max-width: 16em;
  text-wrap: balance;
}

.hero-home .lead { margin: 32px 0 0; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 40px; }

/* ---------- Equipment strip (home) ---------- */

.equip-strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
.equip-inner {
  padding-top: 26px;
  padding-bottom: 26px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 40px;
}
.strip-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
}
.brand-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--muted-strong);
}

/* ---------- Card grids ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1px;
  background: var(--line);
  border-left: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: var(--bg);
  padding: clamp(32px, 4vw, 44px) clamp(24px, 3vw, 40px) 48px;
  text-align: left;
}
.card:hover { background: var(--surface); }

.card-num { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; color: var(--faint); }
.card-title { font-size: clamp(22px, 2.6vw, 27px); font-weight: 600; letter-spacing: -0.02em; }
.card-body { font-size: 15.5px; line-height: 1.6; color: var(--muted); max-width: 26em; }
.card-link { margin-top: 8px; font-size: 13.5px; font-weight: 500; color: var(--accent); }

/* ---------- Avilon Labs band (home) ---------- */

.labs { background: var(--ink); color: var(--on-dark); margin-top: clamp(56px, 8vw, 88px); }
.labs-intro { padding-top: clamp(48px, 7vw, 72px); padding-bottom: clamp(8px, 2vw, 16px); }
.labs-kicker { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

.kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-dark);
}

.chip-dark {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
  border: 1px solid var(--line-dark);
  border-radius: 3px;
  padding: 2px 7px;
}

.h2-labs {
  margin: 24px 0 0;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.1;
  letter-spacing: -0.03em;
  font-weight: 600;
  max-width: 22em;
  text-wrap: balance;
}

.labs-body {
  margin: 20px 0 0;
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.6;
  color: var(--muted-dark);
  max-width: 32em;
  text-wrap: pretty;
}

.labs-cards { padding-bottom: clamp(48px, 7vw, 72px); }

.card-grid-dark {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
  margin-top: 40px;
}

.card-dark { background: var(--ink); color: var(--on-dark); padding: clamp(28px, 3.5vw, 40px); }
.card-dark:hover { background: var(--ink-hover); }
.card-dark .card-body { color: var(--muted-dark); }
.card-dark .card-link { color: var(--accent-dark); }

/* ---------- How we work (home) ---------- */

.how { border-bottom: 1px solid var(--line); }
.how-inner { padding-top: clamp(56px, 8vw, 80px); padding-bottom: clamp(56px, 8vw, 80px); }
.how-heading {
  margin: 0 0 40px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
}
.how-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 32px; }

.how-step-num { font-family: var(--mono); font-size: 12px; color: var(--accent); margin-bottom: 12px; }
.how-step-title { font-size: 19px; font-weight: 600; letter-spacing: -0.015em; }
.how-step-body { margin-top: 8px; font-size: 15px; line-height: 1.6; color: var(--muted); }

.languages-rule {
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 40px;
  align-items: baseline;
}
.languages-value { font-size: 17px; font-weight: 500; }

/* ---------- Page heroes (service / labs / contact) ---------- */

.hero-page { padding-top: clamp(64px, 8vw, 96px); padding-bottom: clamp(40px, 6vw, 64px); }
.hero-page .eyebrow { display: block; margin-bottom: 24px; }

.h1-page {
  margin: 0;
  font-size: clamp(34px, 5.4vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 600;
  max-width: 18em;
  text-wrap: balance;
}
.h1-page-wide { max-width: 20em; }

.hero-page .lead { margin: 28px 0 0; }

.hero-dark { background: var(--ink); color: var(--on-dark); padding-bottom: clamp(56px, 8vw, 88px); }
.hero-dark .eyebrow { color: var(--accent-dark); }
.hero-dark .lead { color: var(--muted-dark); }
.hero-dark .hero-kicker-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-bottom: 24px; }
.hero-dark .hero-kicker-row .eyebrow { margin-bottom: 0; }

/* ---------- Service page body ---------- */

.service-body { border-top: 1px solid var(--line); }
.service-body-grid {
  padding-top: clamp(40px, 6vw, 64px);
  padding-bottom: clamp(40px, 6vw, 64px);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: clamp(40px, 6vw, 80px);
}
.service-body-plain { border-top: 0; }
.section-pad { padding-top: clamp(40px, 6vw, 64px); padding-bottom: clamp(40px, 6vw, 64px); }

.rule-rows { display: grid; gap: 1px; background: var(--line); }
.rule-row { background: var(--bg); padding: 20px 0; }
.row-title { font-size: 17px; font-weight: 600; }
.row-body { margin-top: 6px; font-size: 15px; line-height: 1.6; color: var(--muted); max-width: 34em; }

.faq-list { display: grid; gap: 20px; }
.faq-q { font-size: 16px; font-weight: 600; }
.faq-a { margin-top: 5px; font-size: 15px; line-height: 1.6; color: var(--muted); max-width: 34em; }

.steps { display: grid; gap: 20px; }
.step { display: flex; gap: 16px; }
.step-index { font-family: var(--mono); font-size: 12px; color: var(--accent); padding-top: 4px; }
.step-name { font-size: 16px; font-weight: 600; }
.step-detail { font-size: 14.5px; color: var(--muted); line-height: 1.55; }

.equip-box { margin-top: 40px; border: 1px solid var(--line); padding: 24px; }
.equip-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.equip-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
}
.equip-rows { display: grid; gap: 10px; font-size: 15px; }
.equip-row { display: flex; justify-content: space-between; gap: 16px; }
.equip-key { color: var(--muted); }
.equip-val { font-weight: 500; }

.tiers { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.tier { background: var(--bg); padding: 20px 22px; }
.tier-name { font-size: 16px; font-weight: 600; }
.tier-body { font-size: 14.5px; color: var(--muted); line-height: 1.55; }

.std-list { display: grid; gap: 10px; font-size: 15px; color: var(--muted-strong); }

.fine-print { margin: 24px 0 0; font-size: 13px; line-height: 1.55; color: var(--faint); max-width: 60em; }

select.text-input { font: inherit; color: inherit; appearance: auto; }

/* ---------- AI Agents page ---------- */

.three-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.mini-card { background: var(--bg); padding: clamp(26px, 3vw, 32px) 28px; }
.mini-num { font-family: var(--mono); font-size: 11px; color: var(--faint); letter-spacing: 0.12em; }
.mini-title { margin-top: 14px; font-size: 20px; font-weight: 600; }
.mini-body { margin-top: 8px; font-size: 15px; line-height: 1.6; color: var(--muted); }

.two-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: clamp(40px, 6vw, 80px);
  margin-top: clamp(40px, 6vw, 64px);
}

/* ---------- Closing CTA ---------- */

.cta { border-top: 1px solid var(--line); }
.cta-inner {
  padding-top: clamp(56px, 8vw, 80px);
  padding-bottom: clamp(56px, 8vw, 80px);
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
}
.cta-h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 38px);
  line-height: 1.1;
  letter-spacing: -0.03em;
  font-weight: 600;
  max-width: 20em;
  text-wrap: balance;
}

/* ---------- Contact ---------- */

.contact-grid {
  padding-top: clamp(64px, 8vw, 96px);
  padding-bottom: clamp(64px, 8vw, 96px);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: clamp(48px, 7vw, 96px);
  align-items: start;
}
.contact-eyebrow { display: block; margin-bottom: 24px; }
.h1-contact {
  margin: 0;
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 600;
  text-wrap: balance;
}
.contact-lead {
  margin: 24px 0 40px;
  font-size: clamp(16px, 2vw, 18px);
  line-height: 1.55;
  color: var(--muted);
  max-width: 26em;
  text-wrap: pretty;
}

.dl { display: grid; gap: 1px; background: var(--line); border-top: 1px solid var(--line); margin: 0; }
.dl-row {
  background: var(--bg);
  padding: 18px 0;
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 16px;
  align-items: baseline;
}
.dl-label {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.dl-value { margin: 0; font-size: 15.5px; display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }

.form-panel { border: 1px solid var(--line); padding: clamp(24px, 3vw, 36px); display: grid; gap: 22px; margin: 0; }

.form-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
  border: 1px dashed var(--line-strong);
  padding: 10px 12px;
}

.field { display: grid; gap: 8px; border: 0; margin: 0; padding: 0; min-width: 0; }
.field-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
  padding: 0;
}
.required-mark { color: var(--accent); }

.text-input {
  border: 0;
  border-bottom: 1px solid var(--line-strong);
  border-radius: 0;
  background: none;
  padding: 8px 0;
  font-size: 16px;
  width: 100%;
}
.text-input:focus { outline: none; border-bottom-color: var(--ink); }
.text-input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.text-input[aria-invalid="true"] { border-bottom-color: var(--error); }

.textarea {
  border: 1px solid var(--line-strong);
  background: none;
  padding: 10px;
  font-size: 16px;
  resize: vertical;
  width: 100%;
}
.textarea:focus { outline: none; border-color: var(--ink); }
.textarea:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.field-error { display: none; font-size: 13px; color: var(--error); }
.field-error.is-visible { display: block; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 13.5px;
  background: none;
  cursor: pointer;
  color: var(--ink);
}
.chip:hover { border-color: var(--ink); }
.chip[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); }

.form-status {
  display: none;
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
  padding: 14px 16px;
  border: 1px solid var(--line-strong);
  background: var(--surface);
}
.form-status.is-visible { display: block; }
.form-status.is-error { border-color: var(--error); color: var(--error); background: none; }

/* ---------- Footer ---------- */

.site-footer { border-top: 1px solid var(--line); background: var(--surface); }
.footer-grid {
  padding-top: clamp(36px, 5vw, 48px);
  padding-bottom: clamp(36px, 5vw, 48px);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 40px;
}
.footer-name { font-size: 17px; font-weight: 600; letter-spacing: -0.02em; }
.footer-desc { margin: 8px 0 0; font-size: 14px; color: var(--muted); max-width: 24em; }
.footer-langs { margin-top: 16px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; color: var(--faint); }
.footer-col { display: grid; gap: 10px; align-content: start; font-size: 14px; }
.footer-heading {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
}
.footer-link { color: var(--muted); justify-self: start; }
.footer-link:hover { color: var(--ink); }
.footer-copy { color: var(--faint); }