/* ============================================================
   WIRRAL LABS — design tokens
   ============================================================ */

:root {
  /* Colour */
  --ink: #14140f;
  --ink-soft: #33332b;
  --paper: #f5f2ea;
  --paper-dim: #ece7d9;
  --line: #d8d2c0;
  --line-strong: #14140f;
  --signal: #c1501f;
  --signal-dark: #93380f;
  --ok: #3c5f3f;

  /* Type */
  --font-display: "Fraunces", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --font-body: "IBM Plex Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  /* Fluid type scale */
  --step-0: clamp(1rem, 0.94rem + 0.3vw, 1.125rem);
  --step-1: clamp(1.2rem, 1.1rem + 0.5vw, 1.4rem);
  --step-2: clamp(1.5rem, 1.3rem + 1vw, 1.9rem);
  --step-3: clamp(1.9rem, 1.5rem + 2vw, 2.7rem);
  --step-4: clamp(2.4rem, 1.8rem + 3vw, 4rem);
  --step-5: clamp(3rem, 2.1rem + 4.5vw, 5.6rem);

  /* Layout */
  --max: 1240px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --radius: 2px;
  --border: 1.5px solid var(--line-strong);
  --border-soft: 1px solid var(--line);

  color-scheme: light;
}

/* ============================================================
   Reset
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; padding: 0; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input, textarea { font: inherit; color: inherit; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================================
   Utility
   ============================================================ */

.wrap {
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.tag::before {
  content: "";
  width: 7px;
  height: 7px;
  background: var(--signal);
  display: inline-block;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 0.75em 1.25em;
  z-index: 100;
  font-family: var(--font-mono);
}
.skip-link:focus {
  left: var(--gutter);
  top: var(--gutter);
}

:focus-visible {
  outline: 2.5px solid var(--signal);
  outline-offset: 3px;
}

.section-index {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  letter-spacing: 0.06em;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  padding: 0.85em 1.5em;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  border: var(--border);
  transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
}
.btn-primary:hover { background: var(--signal); border-color: var(--signal); }

.btn-ghost {
  background: transparent;
  color: var(--ink);
}
.btn-ghost:hover { background: var(--ink); color: var(--paper); }

.btn-arrow::after {
  content: "→";
  transition: transform 0.15s ease;
}
.btn:hover .btn-arrow::after,
.btn-arrow:hover::after { transform: translateX(3px); }

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: var(--border);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.25rem;
}

.logo {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.02em;
  display: flex;
  align-items: baseline;
  gap: 0.4em;
}
.logo .dot { color: var(--signal); }

.main-nav {
  display: none;
}

.main-nav ul {
  display: flex;
  gap: 2rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.main-nav a {
  position: relative;
  padding: 0.3em 0;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 2px;
  background: var(--signal);
  transition: right 0.18s ease;
}
.main-nav a:hover::after,
.main-nav a:focus-visible::after { right: 0; }

.header-cta { display: none; }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  border: var(--border);
  padding: 0.55em 0.9em;
}

.nav-toggle .bars {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}
.nav-toggle .bars span {
  height: 2px;
  background: var(--ink);
  display: block;
}

.mobile-nav {
  border-bottom: var(--border);
  background: var(--paper-dim);
  display: none;
}
.mobile-nav.is-open { display: block; }
.mobile-nav ul {
  display: flex;
  flex-direction: column;
}
.mobile-nav a {
  display: block;
  padding: 1em var(--gutter);
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  border-top: var(--border-soft);
}
.mobile-nav .mobile-cta { padding: 1.1em var(--gutter) 1.4em; border-top: var(--border-soft); }

@media (min-width: 880px) {
  .main-nav { display: block; }
  .header-cta { display: inline-flex; }
  .nav-toggle { display: none; }
  .mobile-nav { display: none !important; }
}

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

.hero {
  border-bottom: var(--border);
  padding-block: clamp(2.5rem, 8vw, 5.5rem) clamp(3rem, 8vw, 6rem);
}

.hero-grid {
  display: grid;
  gap: 2.5rem;
}

.hero-eyebrow {
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-5);
  line-height: 1.03;
  letter-spacing: -0.01em;
  max-width: 16ch;
}

.hero h1 em {
  font-style: normal;
  color: var(--signal);
}

.hero-lede {
  margin-top: 1.5rem;
  font-size: var(--step-1);
  max-width: 46ch;
  color: var(--ink-soft);
}

.hero-actions {
  margin-top: 2.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero-facts {
  margin-top: clamp(2.5rem, 6vw, 3.5rem);
  border-top: var(--border-soft);
  padding-top: 1.5rem;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem 2rem;
}

@media (min-width: 620px) {
  .hero-facts { grid-template-columns: repeat(4, 1fr); }
}

.hero-fact dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin-bottom: 0.4em;
}
.hero-fact dd {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 600;
  margin: 0;
}

/* ============================================================
   Section scaffolding
   ============================================================ */

section { border-bottom: var(--border); }
section:last-of-type { border-bottom: none; }

.section-pad {
  padding-block: clamp(3rem, 8vw, 6rem);
}

.section-head {
  display: grid;
  gap: 1rem;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.section-head h2 {
  font-family: var(--font-display);
  font-size: var(--step-4);
  font-weight: 600;
  line-height: 1.08;
  max-width: 18ch;
}

.section-head p {
  max-width: 52ch;
  color: var(--ink-soft);
  font-size: var(--step-1);
}

@media (min-width: 900px) {
  .section-head {
    grid-template-columns: 1fr 1fr;
    align-items: end;
  }
}

/* ============================================================
   Audience
   ============================================================ */

.audience-grid {
  display: grid;
  gap: 1px;
  background: var(--line-strong);
  border: var(--border);
}

@media (min-width: 760px) {
  .audience-grid { grid-template-columns: 1fr 1fr; }
}

.audience-card {
  background: var(--paper);
  padding: clamp(1.75rem, 4vw, 2.75rem);
}

.audience-card .section-index { display: block; margin-bottom: 1.25rem; }

.audience-card h3 {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 600;
  margin-bottom: 0.85rem;
}

.audience-card p { color: var(--ink-soft); margin-bottom: 1.25rem; }

.audience-card ul { display: grid; gap: 0.55rem; }
.audience-card li {
  display: flex;
  gap: 0.65em;
  font-size: 0.94rem;
}
.audience-card li::before {
  content: "//";
  font-family: var(--font-mono);
  color: var(--signal);
  flex-shrink: 0;
}

/* ============================================================
   Services / spec list
   ============================================================ */

.spec-list {
  border-top: var(--border);
}

.spec-row {
  display: grid;
  gap: 0.75rem 2rem;
  padding-block: 1.75rem;
  border-bottom: var(--border-soft);
}

@media (min-width: 760px) {
  .spec-row {
    grid-template-columns: 5rem 1fr 1.4fr;
    align-items: baseline;
  }
}

.spec-row .section-index { align-self: start; }

.spec-row h3 {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 600;
}

.spec-row p { color: var(--ink-soft); max-width: 58ch; }

/* ============================================================
   Positioning triangle
   ============================================================ */

.position-grid {
  display: grid;
  gap: 1px;
  background: var(--line-strong);
  border: var(--border);
}

@media (min-width: 760px) {
  .position-grid { grid-template-columns: repeat(3, 1fr); }
}

.position-card {
  background: var(--paper);
  padding: clamp(1.5rem, 3.5vw, 2.25rem);
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.position-card.is-us {
  background: var(--ink);
  color: var(--paper);
}
.position-card.is-us .section-index { color: var(--paper-dim); }
.position-card.is-us .tag::before { background: var(--signal); }

.position-card h3 {
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 600;
}

.position-card p { font-size: 0.94rem; opacity: 0.85; }

/* ============================================================
   Process / pipeline
   ============================================================ */

.process-list {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: var(--border);
}

@media (min-width: 900px) {
  .process-list { grid-template-columns: repeat(5, 1fr); }
}

.process-step {
  background: var(--paper);
  padding: 1.5rem 1.35rem 1.75rem;
  position: relative;
}

.process-step .section-index { display: block; margin-bottom: 1rem; }

.process-step h3 {
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.process-step p { font-size: 0.9rem; color: var(--ink-soft); }

@media (min-width: 900px) {
  .process-step:not(:last-child)::after {
    content: "→";
    position: absolute;
    right: -0.6rem;
    top: 1.5rem;
    color: var(--signal);
    font-family: var(--font-mono);
    z-index: 2;
  }
}

/* ============================================================
   Proof / case studies
   ============================================================ */

.proof-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 760px) {
  .proof-grid { grid-template-columns: repeat(3, 1fr); }
}

.proof-card {
  border: var(--border-soft);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-height: 15rem;
}

.proof-card.is-placeholder {
  border-style: dashed;
  justify-content: space-between;
  color: var(--ink-soft);
}

.proof-card .status {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.proof-card.is-placeholder .status { color: var(--ink-soft); }
.proof-card .status.is-live { color: var(--ok); }
.proof-card .status.is-live::before { content: "● "; }

.proof-card h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-1);
}

.proof-note {
  margin-top: 2rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
  max-width: 60ch;
}

/* ============================================================
   Approach
   ============================================================ */

.approach {
  display: grid;
  gap: 2.5rem;
}

@media (min-width: 900px) {
  .approach { grid-template-columns: 1fr 1fr; }
}

.approach-copy h2 {
  font-family: var(--font-display);
  font-size: var(--step-4);
  font-weight: 600;
  line-height: 1.08;
  margin-bottom: 1.25rem;
  max-width: 16ch;
}

.approach-copy p { color: var(--ink-soft); max-width: 50ch; }
.approach-copy p + p { margin-top: 1rem; }

.approach-list { display: grid; gap: 1px; background: var(--line-strong); border: var(--border); }

.approach-item {
  background: var(--paper);
  padding: 1.25rem 1.5rem;
  display: grid;
  grid-template-columns: 1.75rem 1fr;
  gap: 0.75rem;
}

.approach-item .mark {
  font-family: var(--font-mono);
  color: var(--signal);
}

.approach-item h4 { font-weight: 600; font-size: 0.98rem; margin-bottom: 0.25rem; }
.approach-item p { font-size: 0.88rem; color: var(--ink-soft); }

/* ============================================================
   Contact
   ============================================================ */

.contact-section { background: var(--ink); color: var(--paper); border-bottom: none; }
.contact-section .tag { color: var(--paper-dim); }
.contact-section .tag::before { background: var(--signal); }

.contact-grid {
  display: grid;
  gap: 2.5rem;
}

@media (min-width: 900px) {
  .contact-grid { grid-template-columns: 1fr 1fr; gap: 4rem; }
}

.contact-intro h2 {
  font-family: var(--font-display);
  font-size: var(--step-4);
  font-weight: 600;
  line-height: 1.06;
  max-width: 14ch;
  margin-bottom: 1.25rem;
}

.contact-intro p { color: var(--paper-dim); max-width: 44ch; margin-bottom: 1.75rem; }

.contact-alt {
  border-top: 1px solid rgba(245,242,234,0.25);
  padding-top: 1.5rem;
  display: grid;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}
.contact-alt a { text-decoration: underline; text-underline-offset: 3px; }

.form-field {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.form-field label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--paper-dim);
}

.form-field input,
.form-field textarea,
.form-field select {
  background: transparent;
  border: 1.5px solid rgba(245,242,234,0.4);
  color: var(--paper);
  padding: 0.75em 0.9em;
  width: 100%;
}

.form-field input::placeholder,
.form-field textarea::placeholder { color: rgba(245,242,234,0.4); }

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  border-color: var(--signal);
  outline: none;
}

.form-row { display: grid; gap: 1.25rem; }
@media (min-width: 560px) {
  .form-row.two { grid-template-columns: 1fr 1fr; }
}

.form-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
}

.form-note { font-size: 0.82rem; color: var(--paper-dim); max-width: 32ch; }

.contact-section .btn-primary { background: var(--signal); border-color: var(--signal); color: var(--ink); }
.contact-section .btn-primary:hover { background: var(--paper); border-color: var(--paper); color: var(--ink); }

.form-status {
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.form-status[data-state="success"] { color: #9fd6a3; }
.form-status[data-state="error"] { color: #e39a7c; }

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

.site-footer {
  background: var(--ink);
  color: var(--paper-dim);
  padding-block: 2.5rem;
}

.footer-grid {
  display: grid;
  gap: 1.75rem;
}

@media (min-width: 760px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }
}

.footer-brand .logo { color: var(--paper); }
.footer-brand p { margin-top: 0.9rem; font-size: 0.88rem; max-width: 32ch; color: var(--paper-dim); }

.footer-col h5 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.9rem;
  color: var(--paper);
}

.footer-col ul { display: grid; gap: 0.55rem; font-size: 0.9rem; }
.footer-col a:hover { text-decoration: underline; text-underline-offset: 3px; }

.footer-bottom {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(245,242,234,0.15);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

/* ============================================================
   Reveal-on-scroll (progressive enhancement)
   ============================================================ */

.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Tighter leading for display type */
h1, h2, h3, h4, .hero-fact dd { line-height: 1.15; }
.hero h1 { line-height: 1.03; }