/* CyberForge AI — Threat Grid Design System */
:root {
  --obsidian: #080B0A;
  --gunmetal: #14181A;
  --bone: #EEF1EC;
  --signal-emerald: #34D399;
  --steel-blue: #3E6E8E;
  --ash-grey: #7E858C;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --container: 1120px;
  --radius: 4px;
  --transition: 0.2s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--bone);
  background: var(--obsidian);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--signal-emerald); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--bone); }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  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, 2vw, 1.5rem); margin-bottom: 0.75rem; }

p { margin-bottom: 1rem; }
ul, ol { margin-bottom: 1rem; padding-left: 1.5rem; }
li { margin-bottom: 0.4rem; }

.mono { font-family: var(--font-mono); font-size: 0.875rem; letter-spacing: 0.02em; }

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

/* Surfaces */
.surface-obsidian { background: var(--obsidian); color: var(--bone); }
.surface-bone { background: var(--bone); color: var(--obsidian); }
.surface-gunmetal { background: var(--gunmetal); color: var(--bone); }
.surface-emerald { background: var(--signal-emerald); color: var(--obsidian); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8, 11, 10, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(52, 211, 153, 0.15);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  gap: 1.5rem;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--bone);
  letter-spacing: -0.03em;
}

.logo span { color: var(--signal-emerald); }

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 1.75rem;
  padding: 0;
  margin: 0;
  align-items: center;
}

.main-nav a {
  color: var(--ash-grey);
  font-size: 0.9rem;
  font-weight: 500;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] { color: var(--bone); }

.btn-nav {
  background: var(--signal-emerald) !important;
  color: var(--obsidian) !important;
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius);
  font-weight: 600 !important;
}

.btn-nav:hover { background: var(--bone) !important; color: var(--obsidian) !important; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--ash-grey);
  color: var(--bone);
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  background: var(--obsidian);
}

.hero-eyebrow-row {
  position: relative;
  z-index: 3;
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: min(100% - 2rem, var(--container));
  margin: 0 auto;
  padding: 1.25rem 0 0.75rem;
  border-bottom: 1px solid rgba(238, 241, 236, 0.2);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero-eyebrow-accent { color: var(--signal-emerald); font-weight: 600; }

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8,11,10,0.55) 0%, rgba(8,11,10,0.82) 70%, rgba(8,11,10,0.95) 100%),
    url('../images/cyberforgeai-01-hero-studio.jpg') center/cover no-repeat;
}

.hero-scan {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(52, 211, 153, 0.03) 2px,
    rgba(52, 211, 153, 0.03) 4px
  );
  pointer-events: none;
}

.hero-sweep {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(52, 211, 153, 0.08) 50%,
    transparent 100%
  );
  background-size: 100% 200%;
  animation: scan-sweep 6s ease-in-out infinite;
  pointer-events: none;
}

@keyframes scan-sweep {
  0%, 100% { background-position: 0 -100%; }
  50% { background-position: 0 100%; }
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 4rem 0;
  max-width: 720px;
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--signal-emerald);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
}

.hero h1 { margin-bottom: 1.25rem; font-size: clamp(2.875rem, 6vw, 5.375rem); font-weight: 700; }

.hero-underline {
  background: linear-gradient(90deg, var(--signal-emerald), var(--signal-emerald)) left bottom / 0% 3px no-repeat;
  animation: underline-draw 1.2s ease forwards 0.4s;
}

@keyframes underline-draw { to { background-size: 100% 3px; } }

.hero-lead {
  font-size: 1.05rem;
  color: rgba(238, 241, 236, 0.85);
  margin-bottom: 2rem;
  max-width: 540px;
}

.hero-trust {
  margin-top: 2.5rem;
  font-size: 0.75rem;
  color: var(--ash-grey);
  letter-spacing: 0.04em;
}

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

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-body);
}

.btn-primary {
  background: var(--signal-emerald);
  color: var(--obsidian);
}

.btn-primary:hover { background: var(--bone); color: var(--obsidian); }

.btn-secondary {
  background: transparent;
  color: var(--bone);
  border: 1px solid var(--steel-blue);
}

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

/* Sections */
.section { padding: 5rem 0; }
.section-sm { padding: 3rem 0; }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--signal-emerald);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2.5rem; align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.75rem; }

.card {
  background: var(--gunmetal);
  border: 1px solid rgba(126, 133, 140, 0.2);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color var(--transition);
}

.card:hover { border-color: rgba(52, 211, 153, 0.4); }

.card-icon {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--steel-blue);
  margin-bottom: 0.75rem;
}

/* Page header */
.page-hero {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid rgba(126, 133, 140, 0.15);
}

.page-hero h1 { margin-bottom: 0.75rem; }

.page-hero .lead { color: var(--ash-grey); font-size: 1.1rem; max-width: 640px; }

/* Image blocks */
.img-block {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(126, 133, 140, 0.2);
}

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

.img-caption {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ash-grey);
  padding: 0.5rem 0.75rem;
  background: var(--gunmetal);
}

/* Services */
.service-card h3 { color: var(--signal-emerald); }

/* FAQ */
.faq-item {
  border-bottom: 1px solid rgba(126, 133, 140, 0.2);
  padding: 1.25rem 0;
}

.faq-item summary {
  font-family: var(--font-display);
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

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

.faq-item summary::after {
  content: '+';
  font-family: var(--font-mono);
  color: var(--signal-emerald);
  flex-shrink: 0;
}

.faq-item[open] summary::after { content: '−'; }

.faq-answer { padding-top: 1rem; color: var(--ash-grey); }

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

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--gunmetal);
  border: 1px solid rgba(126, 133, 140, 0.3);
  border-radius: var(--radius);
  color: var(--bone);
  font-family: var(--font-body);
  font-size: 1rem;
}

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

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

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}

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

.checkbox-group label { margin-bottom: 0; font-weight: 400; font-size: 0.875rem; }

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

/* Reveal — visible without JS; scroll enhancement with safety timeout in main.js */
.reveal { opacity: 1; transform: none; }
.js .reveal:not(.is-visible) { opacity: 0; transform: translateY(16px); transition: opacity 0.5s ease, transform 0.5s ease; }
.js .reveal.is-visible { opacity: 1; transform: none; }

/* Footer */
.site-footer {
  background: var(--gunmetal);
  border-top: 1px solid rgba(52, 211, 153, 0.15);
  padding: 3.5rem 0 2rem;
  margin-top: 4rem;
}

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

.footer-brand .logo { display: inline-block; margin-bottom: 1rem; }

.footer-brand p { font-size: 0.875rem; color: var(--ash-grey); }

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 1rem;
  color: var(--bone);
}

.footer-col ul { list-style: none; padding: 0; }
.footer-col li { margin-bottom: 0.5rem; }
.footer-col a { color: var(--ash-grey); font-size: 0.875rem; }
.footer-col a:hover { color: var(--signal-emerald); }

.footer-bottom {
  border-top: 1px solid rgba(126, 133, 140, 0.2);
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--ash-grey);
}

.footer-disclaimer {
  margin-top: 1.5rem;
  padding: 1rem;
  background: rgba(8, 11, 10, 0.5);
  border-radius: var(--radius);
  font-size: 0.75rem;
  color: var(--ash-grey);
  line-height: 1.5;
}

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: var(--gunmetal);
  border-top: 1px solid rgba(52, 211, 153, 0.3);
  padding: 1.5rem;
  transform: translateY(100%);
  transition: transform 0.3s ease;
}

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

.cookie-inner {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

.cookie-banner p { font-size: 0.875rem; color: var(--ash-grey); margin-bottom: 1rem; }

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

.cookie-actions .btn { font-size: 0.8rem; padding: 0.55rem 1rem; }

.cookie-customise {
  display: none;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(126, 133, 140, 0.2);
}

.cookie-customise.visible { display: block; }

.cookie-customise label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
  cursor: pointer;
}

/* Legal prose */
.legal-content h2 { margin-top: 2.5rem; font-size: 1.35rem; }
.legal-content h3 { margin-top: 1.75rem; font-size: 1.1rem; }
.legal-content p, .legal-content li { color: var(--ash-grey); }

/* 404 */
.error-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
  text-align: center;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 6rem;
  color: var(--steel-blue);
  line-height: 1;
  margin-bottom: 1rem;
}

/* Work cases */
.case-study { margin-bottom: 3rem; }
.case-meta { font-family: var(--font-mono); font-size: 0.75rem; color: var(--steel-blue); margin-bottom: 0.5rem; }

/* Thanks */
.thanks-box {
  text-align: center;
  padding: 5rem 0;
  min-height: 50vh;
}

/* Responsive */
@media (prefers-reduced-motion: reduce) {
  .hero-sweep { animation: none; }
  .hero-underline { background-size: 100% 3px; animation: none; }
  html { scroll-behavior: auto; }
}

@media (max-width: 900px) {
  .grid-2, .grid-3, .footer-grid { grid-template-columns: 1fr; }
  .nav-toggle { display: block; }
  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--gunmetal);
    border-bottom: 1px solid rgba(52, 211, 153, 0.15);
    display: none;
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; padding: 1rem; gap: 0.75rem; align-items: stretch; }
  .main-nav a { display: block; padding: 0.5rem 0; }
  .site-header .container { position: relative; }
}

@media (max-width: 600px) {
  .hero { min-height: 82vh; }
  .hero-cta { flex-direction: column; }
  .hero-cta .btn { text-align: center; }
  .section { padding: 3rem 0; }
}