/* Advanced Process Labs — design system
   Editorial styling drawn from the logo: navy and royal blue, white paper,
   squared geometry, hairline rules, generous whitespace. */

:root {
  --navy: #12263d; /* logo navy — dark surfaces: hero, contact, footer */
  --navy-deep: #0b1a2d;
  --ink: #12263d; /* body text and headings */
  --ink-soft: #55606f;
  --paper: #ffffff;
  --paper-alt: #f4f6fa;
  --accent: #3b6ff2; /* logo blue */
  --accent-dark: #2b58cc;
  --line: #dbe0e6;
  --line-dark: rgba(255, 255, 255, 0.18);
  --danger: #b3261e;
  --ok: #177b57; /* status colour only — not a brand colour */
  --maxw: 1200px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.skip-link {
  position: absolute;
  left: 1rem;
  top: 0;
  transform: translateY(-120%);
  z-index: 30;
  padding: 0.75rem 1.25rem;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(var(--maxw), calc(100% - 3rem));
  margin: 0 auto;
}

/* ---------- typography ---------- */

h1,
h2,
h3 {
  margin: 0 0 1rem;
  line-height: 1.1;
  letter-spacing: -0.025em;
  font-weight: 700;
}

h1 {
  font-size: clamp(2.6rem, 5.2vw, 4.6rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(1.9rem, 3.2vw, 2.9rem);
}

h3 {
  font-size: 1.2rem;
  letter-spacing: -0.01em;
}

p {
  margin: 0 0 1rem;
}

.eyebrow {
  display: block;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--accent);
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.72rem;
  width: fit-content;
}

.eyebrow-light {
  color: #fff;
  border-bottom-color: var(--accent);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.1rem 0;
  position: relative;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 800;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}

.brand-mark {
  width: 36px;
  height: 36px;
  flex: none;
}

.brand-name {
  color: var(--navy);
}

/* "Labs" carries the blue, mirroring the logo lockup */
.brand-name span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  font-size: 0.92rem;
  font-weight: 500;
}

.nav-links a {
  position: relative;
  padding: 0.3rem 0;
  color: var(--ink);
  white-space: nowrap;
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 200ms ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: 0;
  padding: 0.35rem;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
  transition: transform 200ms ease, opacity 200ms ease;
}

.nav-toggle[aria-expanded='true'] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded='true'] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded='true'] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- buttons & arrow links ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem 1.75rem;
  border: 2px solid transparent;
  font-weight: 600;
  font-size: 0.95rem;
  font-family: inherit;
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.btn::after {
  content: '→';
  transition: transform 180ms ease;
}

.btn:hover::after {
  transform: translateX(4px);
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

.btn-primary:disabled {
  background: var(--ink-soft);
  border-color: var(--ink-soft);
  cursor: not-allowed;
}

.btn-primary:disabled::after {
  transform: none;
}

/* outlined-on-dark, used in the hero */
.btn-ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.5);
  color: #fff;
}

.btn-ghost:hover {
  background: #fff;
  border-color: #fff;
  color: var(--ink);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
  padding-bottom: 0.25rem;
  border-bottom: 2px solid var(--accent);
  color: var(--ink);
  font-weight: 600;
  font-size: 0.95rem;
  width: fit-content;
}

.link-arrow::after {
  content: '→';
  color: var(--accent);
  transition: transform 180ms ease;
}

.link-arrow:hover::after {
  transform: translateX(4px);
}

.link-arrow-light {
  color: #fff;
}

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

.hero {
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-deep) 100%);
  color: #fff;
  padding: 6rem 0 0;
}

.hero-inner {
  padding-bottom: 4.5rem;
  max-width: 1000px;
}

.hero h1 {
  margin-bottom: 1.75rem;
}

.hero-copy {
  max-width: 58ch;
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.75);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2.5rem;
}

.hero-rule {
  height: 1px;
  background: var(--line-dark);
}

.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 0;
  padding: 0;
}

.stats-strip > div {
  padding: 2.25rem 1.5rem 2.5rem 0;
  border-right: 1px solid var(--line-dark);
}

.stats-strip > div:last-child {
  border-right: 0;
}

.stats-strip > div:not(:first-child) {
  padding-left: 1.5rem;
}

.stats-strip dt {
  order: 2;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.85rem;
}

.stats-strip dd {
  order: 1;
  margin: 0 0 0.35rem;
  font-size: clamp(1.9rem, 3vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--accent);
}

.stats-strip > div {
  display: flex;
  flex-direction: column;
}

/* ---------- sections ---------- */

.section {
  padding: 6rem 0;
  border-bottom: 1px solid var(--line);
}

.section-alt {
  background: var(--paper-alt);
}

.lead-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
  align-items: start;
}

.lead-left h2 {
  max-width: 15ch;
}

.lead-right p {
  color: var(--ink-soft);
  font-size: 1.05rem;
  max-width: 52ch;
}

/* ---------- ERP feature grid ---------- */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.feature {
  padding: 2rem 1.75rem 2.5rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background 200ms ease;
}

.feature:hover {
  background: var(--paper-alt);
}

.feature-num {
  display: block;
  margin-bottom: 1.25rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.feature p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* ---------- cards ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
}

.card {
  padding: 2rem 1.75rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-top: 3px solid var(--navy);
  transition: border-top-color 200ms ease, transform 200ms ease;
}

.card:hover {
  border-top-color: var(--accent);
  transform: translateY(-4px);
}

.card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* ---------- process ---------- */

.process-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.step {
  display: flex;
  gap: 1.5rem;
  padding: 2.25rem 2rem 2.25rem 0;
  border-bottom: 1px solid var(--line);
}

.step:nth-child(odd) {
  border-right: 1px solid var(--line);
}

.step:nth-child(even) {
  padding-left: 2rem;
}

.step-num {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--accent);
  padding-top: 0.35rem;
}

.step p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* ---------- contact ---------- */

.contact-section {
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-deep) 100%);
  color: #fff;
  border-bottom: 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-copy {
  color: rgba(255, 255, 255, 0.75);
  max-width: 42ch;
  font-size: 1.05rem;
}

.contact-direct {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
  margin-top: 2.5rem;
}

.contact-form {
  display: grid;
  gap: 1.25rem;
  padding: 2.5rem;
  background: #fff;
  color: var(--ink);
}

.field {
  display: grid;
  gap: 0.45rem;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.field label {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.field input,
.field textarea,
.field select {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  font-size: 0.95rem;
  transition: border-color 160ms ease;
}

.field textarea {
  resize: vertical;
  min-height: 6.5rem;
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: inset 0 -2px 0 var(--accent);
}

.field input[aria-invalid='true'],
.field textarea[aria-invalid='true'] {
  border-color: var(--danger);
}

.contact-form .btn {
  justify-self: start;
}

/* honeypot — visually gone, still reachable to naive bots */
.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-note {
  margin: 0;
  min-height: 1.4rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.form-note.error {
  color: var(--danger);
  font-weight: 500;
}

.form-note.success {
  color: var(--ok);
  font-weight: 500;
}

.recaptcha-note {
  margin: 0;
  font-size: 0.72rem;
  color: var(--ink-soft);
}

.recaptcha-note a {
  text-decoration: underline;
}

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

.site-footer {
  padding: 2.5rem 0;
  background: var(--navy-deep);
  color: rgba(255, 255, 255, 0.6);
  border-top: 1px solid var(--line-dark);
  font-size: 0.9rem;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-row p {
  margin: 0;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-brand img {
  flex: none;
}

/* ---------- reveal on scroll ---------- */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 700ms ease, transform 700ms ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ---------- responsive ---------- */

@media (max-width: 1024px) {
  .feature-grid,
  .card-grid,
  .stats-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stats-strip > div:nth-child(2n) {
    border-right: 0;
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 1px);
    right: 0;
    left: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 30px rgba(0, 0, 0, 0.08);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 1rem 0;
    border-top: 1px solid var(--line);
  }

  .nav-links a::after {
    display: none;
  }

  .lead-grid,
  .contact-grid,
  .process-list,
  .field-row {
    grid-template-columns: 1fr;
  }

  .step:nth-child(odd) {
    border-right: 0;
  }

  .step:nth-child(even) {
    padding-left: 0;
  }

  .hero {
    padding-top: 4rem;
  }

  .section {
    padding: 4rem 0;
  }

  .contact-form {
    padding: 1.75rem;
  }
}

@media (max-width: 560px) {
  .feature-grid,
  .card-grid,
  .stats-strip {
    grid-template-columns: 1fr;
  }

  .stats-strip > div {
    border-right: 0;
    border-bottom: 1px solid var(--line-dark);
    padding-left: 0 !important;
  }

  .container {
    width: calc(100% - 2rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}