/* RoboSpark — The Cell design system */
:root {
  --gunmetal: #14181C;
  --graphite: #20262D;
  --pale-steel: #ECEFF2;
  --signal-orange: #FF6A2C;
  --cool-grey: #838C96;
  --font-heading: 'Archivo', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --header-height: 72px;
  --max-width: 1200px;
  --radius: 4px;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background: var(--gunmetal);
  color: var(--pale-steel);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: var(--signal-orange);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: #ff8a5c;
}

h1, h2, h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); margin-bottom: 1rem; }
h3 { font-size: clamp(1.125rem, 2.5vw, 1.5rem); margin-bottom: 0.75rem; }

p { margin-bottom: 1rem; }

ul, ol { margin-bottom: 1rem; padding-left: 1.5rem; }
li { margin-bottom: 0.5rem; }

label, .label-mono {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--cool-grey);
}

/* Surfaces */
.surface-gunmetal { background: var(--gunmetal); }
.surface-steel { background: var(--pale-steel); color: var(--gunmetal); }
.surface-graphite { background: var(--graphite); }
.surface-orange { background: var(--signal-orange); color: var(--gunmetal); }

.surface-steel a { color: var(--signal-orange); }
.surface-steel h1, .surface-steel h2, .surface-steel h3 { color: var(--gunmetal); }

/* Layout */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5rem 0;
}

.section-compact {
  padding: 3rem 0;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(20, 24, 28, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.site-header.is-scrolled {
  border-bottom-color: var(--graphite);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--pale-steel);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo:hover { color: var(--pale-steel); }

.logo img {
  width: 36px;
  height: 36px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--graphite);
  color: var(--pale-steel);
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.main-nav ul {
  display: flex;
  gap: 2rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.main-nav a {
  color: var(--pale-steel);
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--signal-orange);
  transition: width var(--transition);
}

.main-nav a:hover,
.main-nav a.is-active {
  color: var(--signal-orange);
}

.main-nav a:hover::after,
.main-nav a.is-active::after {
  width: 100%;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(20, 24, 28, 0.88) 0%, rgba(20, 24, 28, 0.65) 50%, rgba(32, 38, 45, 0.85) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
  padding: 4rem 0;
}

.hero .label-mono {
  display: block;
  margin-bottom: 1rem;
  color: var(--signal-orange);
}

.hero h1 {
  margin-bottom: 1.5rem;
}

.hero-lead {
  font-size: 1.2rem;
  color: var(--cool-grey);
  margin-bottom: 2rem;
  max-width: 560px;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Page hero (inner pages) */
.page-hero {
  padding: calc(var(--header-height) + 4rem) 0 3rem;
  border-bottom: 1px solid var(--graphite);
}

.page-hero .label-mono {
  display: block;
  margin-bottom: 0.75rem;
  color: var(--signal-orange);
}

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

.page-hero-lead {
  font-size: 1.125rem;
  color: var(--cool-grey);
  max-width: 640px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border: 2px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--signal-orange);
  color: var(--gunmetal);
  border-color: var(--signal-orange);
}

.btn-primary:hover {
  background: #ff8a5c;
  border-color: #ff8a5c;
  color: var(--gunmetal);
}

.btn-secondary {
  background: transparent;
  color: var(--pale-steel);
  border-color: var(--cool-grey);
}

.btn-secondary:hover {
  border-color: var(--signal-orange);
  color: var(--signal-orange);
}

/* Grid */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

/* Cards */
.card {
  background: var(--graphite);
  border: 1px solid rgba(131, 140, 150, 0.2);
  border-radius: var(--radius);
  padding: 2rem;
  transition: border-color var(--transition), transform var(--transition);
}

.card:hover {
  border-color: var(--signal-orange);
  transform: translateY(-2px);
}

.card-icon {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--signal-orange);
  margin-bottom: 1rem;
}

.card h3 {
  color: var(--pale-steel);
}

.card p:last-child {
  margin-bottom: 0;
  color: var(--cool-grey);
}

/* Feature block */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.feature-block.reverse {
  direction: rtl;
}

.feature-block.reverse > * {
  direction: ltr;
}

.feature-image {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--graphite);
}

.feature-image img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

/* Stats strip */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  padding: 2.5rem 0;
  border-top: 1px solid var(--graphite);
  border-bottom: 1px solid var(--graphite);
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--signal-orange);
  display: block;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--cool-grey);
}

/* Process steps */
.process-list {
  list-style: none;
  padding: 0;
  counter-reset: step;
}

.process-list li {
  position: relative;
  padding-left: 3.5rem;
  margin-bottom: 2rem;
  counter-increment: step;
}

.process-list li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--signal-orange);
  border: 1px solid var(--signal-orange);
  width: 2.25rem;
  height: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
}

/* FAQ */
.faq-list {
  list-style: none;
  padding: 0;
}

.faq-item {
  border-bottom: 1px solid var(--graphite);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  color: var(--pale-steel);
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  text-align: left;
  padding: 1.5rem 2.5rem 1.5rem 0;
  cursor: pointer;
  position: relative;
}

.faq-question::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--signal-orange);
  transition: transform var(--transition);
}

.faq-item.is-open .faq-question::after {
  content: '−';
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  color: var(--cool-grey);
}

.faq-item.is-open .faq-answer {
  max-height: 800px;
  padding-bottom: 1.5rem;
}

/* Form */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.875rem 1rem;
  background: var(--gunmetal);
  border: 1px solid var(--graphite);
  border-radius: var(--radius);
  color: var(--pale-steel);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color var(--transition);
}

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

.form-group textarea {
  min-height: 160px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.checkbox-group input {
  width: auto;
  margin-top: 0.25rem;
}

.checkbox-group label {
  font-family: var(--font-body);
  font-size: 0.875rem;
  text-transform: none;
  letter-spacing: normal;
  color: var(--cool-grey);
}

/* Contact layout */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
}

.contact-details {
  list-style: none;
  padding: 0;
}

.contact-details li {
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--graphite);
}

.contact-details li:last-child {
  border-bottom: none;
}

/* Work / case cards */
.case-card {
  background: var(--graphite);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(131, 140, 150, 0.15);
}

.case-card img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
}

.case-card-body {
  padding: 1.75rem;
}

.case-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--signal-orange);
  margin-bottom: 0.75rem;
  display: block;
}

/* Legal prose */
.legal-content h2 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.legal-content h3 {
  margin-top: 1.75rem;
  font-size: 1.125rem;
}

.legal-content p,
.legal-content li {
  color: var(--cool-grey);
}

.legal-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--cool-grey);
  margin-bottom: 2rem;
}

.legal-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--graphite);
}

.legal-nav a {
  font-size: 0.875rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--graphite);
  border-radius: var(--radius);
}

.legal-nav a.is-active {
  border-color: var(--signal-orange);
  background: rgba(255, 106, 44, 0.1);
}

/* CTA band */
.cta-band {
  text-align: center;
  padding: 4rem 2rem;
}

.cta-band h2 {
  margin-bottom: 1rem;
}

.cta-band p {
  max-width: 520px;
  margin: 0 auto 2rem;
}

.cta-band.surface-orange p {
  color: var(--gunmetal);
  font-weight: 500;
  font-size: 1.0625rem;
  line-height: 1.7;
}

/* Footer */
.site-footer {
  margin-top: auto;
  background: var(--graphite);
  border-top: 1px solid rgba(131, 140, 150, 0.15);
  padding: 3rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.footer-brand p {
  color: var(--cool-grey);
  font-size: 0.9rem;
  margin-top: 1rem;
}

.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--signal-orange);
  margin-bottom: 1rem;
}

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

.footer-col li {
  margin-bottom: 0.5rem;
}

.footer-col a {
  color: var(--cool-grey);
  font-size: 0.9rem;
}

.footer-col a:hover {
  color: var(--signal-orange);
}

.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.footer-disclaimer {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--cool-grey);
  max-width: 72ch;
  margin-bottom: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(131, 140, 150, 0.25);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(131, 140, 150, 0.15);
  font-size: 0.8rem;
  color: var(--cool-grey);
}

.footer-bottom a {
  color: var(--cool-grey);
}

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2000;
  background: var(--graphite);
  border-top: 1px solid var(--signal-orange);
  padding: 1.5rem;
  transform: translateY(100%);
  transition: transform 0.4s ease;
}

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

.cookie-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
}

.cookie-text {
  flex: 1;
  min-width: 280px;
  font-size: 0.9rem;
  color: var(--cool-grey);
}

.cookie-text a {
  color: var(--signal-orange);
}

.cookie-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.cookie-actions .btn {
  padding: 0.625rem 1.25rem;
  font-size: 0.85rem;
}

.cookie-modal {
  position: fixed;
  inset: 0;
  z-index: 2100;
  background: rgba(20, 24, 28, 0.85);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.cookie-modal.is-visible {
  display: flex;
}

.cookie-modal-content {
  background: var(--graphite);
  border: 1px solid var(--cool-grey);
  border-radius: var(--radius);
  padding: 2rem;
  max-width: 480px;
  width: 100%;
}

.cookie-modal-content h3 {
  margin-bottom: 1rem;
}

.cookie-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  border-bottom: 1px solid var(--gunmetal);
}

.cookie-option label {
  font-family: var(--font-body);
  text-transform: none;
  letter-spacing: normal;
  color: var(--pale-steel);
  font-size: 0.95rem;
}

.cookie-option input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--signal-orange);
}

.cookie-modal-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* 404 */
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--header-height) 1.5rem 3rem;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 6rem;
  font-weight: 700;
  color: var(--signal-orange);
  line-height: 1;
  margin-bottom: 1rem;
}

/* Thanks page */
.thanks-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--header-height) 1.5rem 3rem;
}

.thanks-icon {
  width: 64px;
  height: 64px;
  border: 2px solid var(--signal-orange);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  font-size: 1.5rem;
  color: var(--signal-orange);
}

/* Team */
.team-card {
  text-align: center;
}

.team-card img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

.team-card h3 {
  margin-bottom: 0.25rem;
}

.team-role {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--signal-orange);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Responsive */
@media (max-width: 992px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-strip { grid-template-columns: repeat(2, 1fr); }
  .feature-block { grid-template-columns: 1fr; }
  .feature-block.reverse { direction: ltr; }
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--gunmetal);
    border-bottom: 1px solid var(--graphite);
    padding: 1rem 1.5rem;
    transform: translateY(-120%);
    opacity: 0;
    transition: transform var(--transition), opacity var(--transition);
    pointer-events: none;
  }

  .main-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 0;
  }

  .main-nav li {
    border-bottom: 1px solid var(--graphite);
  }

  .main-nav a {
    display: block;
    padding: 1rem 0;
  }

  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; }
  .hero-cta .btn { width: 100%; }
}

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