/* AI Brand Lab — aibrandlab.life */
:root {
  --ink: #18181B;
  --lab-coral: #F43F5E;
  --paper: #FFFBEB;
  --slate: #64748B;
  --white: #FFFFFF;
  --font-display: "Syne", system-ui, sans-serif;
  --font-body: "Source Sans 3", system-ui, sans-serif;
  --max-width: 72rem;
  --radius: 0.375rem;
  --transition: 0.3s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 100%; }

body {
  font-family: var(--font-body);
  line-height: 1.65;
  color: var(--slate);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: inherit; text-decoration: underline; text-underline-offset: 2px; }
a:hover { opacity: 0.85; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.2;
  font-weight: 700;
  color: var(--ink);
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.125rem); margin-bottom: 1rem; }
h3 { font-size: clamp(1.125rem, 2.5vw, 1.375rem); margin-bottom: 0.75rem; }

p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

ul, ol { margin-bottom: 1rem; padding-left: 1.5rem; }
li { margin-bottom: 0.35rem; }

/* Surfaces */
.surface-dark {
  background: var(--ink);
  color: var(--paper);
}
.surface-dark a { color: var(--paper); }
.surface-dark h1, .surface-dark h2, .surface-dark h3, .surface-dark h4 { color: var(--paper); }

.surface-light {
  background: var(--paper);
  color: var(--slate);
}

.surface-accent {
  background: var(--lab-coral);
  color: var(--paper);
}
.surface-accent a { color: var(--paper); }
.surface-accent h1, .surface-accent h2, .surface-accent h3, .surface-accent h4 { color: var(--paper); }

.surface-muted {
  background: #F1F5F9;
  color: var(--slate);
}

/* Layout */
.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

.section { padding: 4rem 0; }
.section--compact { padding: 2.5rem 0; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  border-bottom: 1px solid rgba(255, 251, 235, 0.1);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  gap: 1rem;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: -0.02em;
}

.logo span { color: var(--lab-coral); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid rgba(255, 251, 235, 0.25);
  color: var(--paper);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.875rem;
}

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  padding: 0;
  margin: 0;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 600;
  opacity: 0.9;
}
.main-nav a:hover,
.main-nav a[aria-current="page"] {
  opacity: 1;
  text-decoration: underline;
  text-decoration-color: var(--lab-coral);
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--ink);
    padding: 1rem;
    border-bottom: 1px solid rgba(255, 251, 235, 0.1);
  }
  .main-nav.is-open { display: block; }
  .main-nav ul { flex-direction: column; gap: 0.75rem; }
}

/* Hero Pattern C — Asymmetric Magazine */
.hero-magazine {
  display: grid;
  grid-template-columns: auto 1fr;
  min-height: 82vh;
  background: var(--ink);
  overflow: hidden;
}

.hero-magazine__label {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 0.65rem;
  background: var(--lab-coral);
  color: var(--paper);
  font-family: var(--font-display);
  font-size: 0.6875rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  white-space: nowrap;
}

.hero-magazine__body {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: end;
  padding: clamp(2rem, 5vw, 4rem) clamp(1rem, 4vw, 2rem) clamp(2rem, 4vw, 3.5rem);
}

.hero-magazine__text {
  padding-bottom: clamp(1rem, 3vw, 2.5rem);
  padding-top: clamp(0.5rem, 2vw, 1.5rem);
}

.hero-magazine__text h1 {
  color: var(--paper);
  margin-bottom: 1rem;
  max-width: 32rem;
  margin-left: 80px;
}

.hero-magazine__lead {
  color: rgba(255, 251, 235, 0.92);
  font-size: 1.125rem;
  max-width: 34rem;
  margin-bottom: 1.75rem;
  margin-left: 80px;
}

.hero-magazine__text .btn-group {
  margin-left: 80px;
}

.hero-magazine__visual {
  position: relative;
  margin-top: clamp(-2rem, -4vw, -3.5rem);
  margin-bottom: clamp(0.5rem, 2vw, 1.5rem);
}

.hero-magazine__visual img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.4);
}

.hero-magazine__visual::before {
  content: "";
  position: absolute;
  top: -0.75rem;
  right: -0.75rem;
  width: 40%;
  height: 40%;
  border: 2px solid var(--lab-coral);
  border-radius: var(--radius);
  z-index: -1;
}

.hero-magazine__caption {
  font-size: 0.8125rem;
  color: rgba(255, 251, 235, 0.72);
  margin-top: 0.65rem;
  font-style: italic;
  max-width: 28rem;
}

@media (max-width: 860px) {
  .hero-magazine {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  .hero-magazine__label {
    writing-mode: horizontal-tb;
    transform: none;
    padding: 0.65rem 1rem;
    letter-spacing: 0.18em;
  }
  .hero-magazine__body {
    grid-template-columns: 1fr;
    padding-top: 1.5rem;
  }
  .hero-magazine__visual {
    margin-top: 0;
    order: -1;
  }
  .hero-magazine__text h1,
  .hero-magazine__lead,
  .hero-magazine__text .btn-group {
    margin-left: 0;
  }
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9375rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

.btn--primary {
  background: var(--lab-coral);
  color: var(--paper);
}
.btn--primary:hover { background: #e11d48; opacity: 1; }

.btn--secondary {
  background: transparent;
  color: var(--paper);
  border: 2px solid var(--paper);
}
.btn--secondary:hover { background: rgba(255, 251, 235, 0.08); opacity: 1; }

.btn--dark {
  background: var(--ink);
  color: var(--paper);
}
.btn--dark:hover { background: #27272a; opacity: 1; }

.btn--outline {
  background: transparent;
  color: var(--ink);
  border: 2px solid var(--ink);
}
.btn--outline:hover { background: rgba(24, 24, 27, 0.06); opacity: 1; }

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Grid & Cards */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  align-items: center;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: 0 2px 12px rgba(24, 24, 27, 0.06);
  border: 1px solid rgba(100, 116, 139, 0.12);
}

.surface-dark .card {
  background: rgba(255, 251, 235, 0.06);
  box-shadow: none;
  border-color: rgba(255, 251, 235, 0.1);
}

.card img {
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

.card__tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.6875rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lab-coral);
  margin-bottom: 0.5rem;
}

.surface-light .card__tag { color: var(--lab-coral); }

.programme-card {
  border-left: 3px solid var(--lab-coral);
}

/* Page hero */
.page-hero {
  padding: 3rem 0 2.5rem;
}

.page-hero h1 { margin-bottom: 0.75rem; }
.page-hero__lead {
  font-size: 1.125rem;
  max-width: 40rem;
  opacity: 0.9;
}

/* Forms */
.form-group { margin-bottom: 1.25rem; }

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 0.35rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid rgba(100, 116, 139, 0.3);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 1rem;
  background: var(--white);
  color: var(--ink);
}

.form-group textarea { min-height: 140px; resize: vertical; }

.form-check {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  font-size: 0.9rem;
  font-weight: 400;
}

.form-check input { margin-top: 0.25rem; width: auto; }

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: 2px solid var(--lab-coral);
  outline-offset: 1px;
}

.form-error {
  color: #be123c;
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

.form-alert {
  padding: 1rem;
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
  font-size: 0.9375rem;
}

.form-alert--success {
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: #166534;
}

.form-alert--error {
  background: rgba(244, 63, 94, 0.1);
  border: 1px solid rgba(244, 63, 94, 0.3);
  color: #9f1239;
}

.hp {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  width: 0;
  overflow: hidden;
}

/* FAQ */
.faq-item {
  border-bottom: 1px solid rgba(100, 116, 139, 0.15);
  padding: 1.25rem 0;
}

.faq-item summary {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  cursor: pointer;
  list-style: none;
  color: var(--ink);
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::before {
  content: "+ ";
  color: var(--lab-coral);
  font-weight: 800;
}

.faq-item[open] summary::before { content: "− "; }

.faq-item p { margin-top: 0.75rem; padding-left: 1.25rem; }

/* Footer */
.site-footer {
  padding: 3rem 0 2rem;
  font-size: 0.875rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-grid h4 {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
  opacity: 0.7;
}

.footer-grid ul {
  list-style: none;
  padding: 0;
}

.footer-grid li { margin-bottom: 0.4rem; }
.footer-grid a { text-decoration: none; opacity: 0.85; }
.footer-grid a:hover { opacity: 1; text-decoration: underline; }

.footer-bottom {
  border-top: 1px solid rgba(255, 251, 235, 0.12);
  padding-top: 1.5rem;
  opacity: 0.75;
  font-size: 0.8125rem;
}

.surface-light .footer-bottom {
  border-top-color: rgba(100, 116, 139, 0.15);
}

.disclaimer {
  font-size: 0.8125rem;
  opacity: 0.85;
  line-height: 1.55;
  margin-top: 1rem;
}

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: var(--ink);
  color: var(--paper);
  padding: 1.25rem;
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.25);
  transform: translateY(100%);
  transition: transform 0.4s ease;
}

.cookie-banner.is-visible { transform: translateY(0); }

.cookie-banner__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  justify-content: space-between;
}

.cookie-banner p {
  flex: 1 1 280px;
  margin: 0;
  font-size: 0.875rem;
}

.cookie-banner__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.cookie-banner .btn {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
}

.cookie-customise {
  display: none;
  width: 100%;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 251, 235, 0.12);
}

.cookie-customise.is-open { display: block; }

.cookie-option {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
}

/* Reveal animation */
.reveal {
  opacity: 1;
  transform: none;
}

.js .reveal {
  opacity: 0;
  transform: translateY(1.25rem);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* Legal prose */
.legal-prose h2 {
  margin-top: 2rem;
  font-size: 1.375rem;
}

.legal-prose h3 {
  margin-top: 1.5rem;
  font-size: 1.125rem;
}

.legal-prose p,
.legal-prose li { font-size: 0.9375rem; }

.legal-links {
  list-style: none;
  padding: 0;
}

.legal-links li { margin-bottom: 0.75rem; }

.legal-links a {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  text-decoration: none;
}

.legal-links a:hover { text-decoration: underline; }

/* 404 */
.error-page {
  min-height: 50vh;
  display: flex;
  align-items: center;
  text-align: center;
  padding: 4rem 0;
}

.error-page h1 { margin-bottom: 1rem; }

/* Utility */
.text-center { text-align: center; }
.mt-2 { margin-top: 2rem; }
.mb-2 { margin-bottom: 2rem; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.img-caption {
  font-size: 0.8125rem;
  opacity: 0.75;
  margin-top: 0.5rem;
  font-style: italic;
}