/* COBRRA - restrained AI systems consulting site */

:root {
  --bg: #05070b;
  --bg-soft: #0a0f18;
  --bg-panel: #0d1420;
  --text: #f2efe8;
  --text-muted: #b9b5aa;
  --text-dim: #868276;
  --accent: #b7a36a;
  --accent-strong: #d2bd7a;
  --border: rgba(242, 239, 232, 0.12);
  --border-strong: rgba(183, 163, 106, 0.42);
  --maxw: 1120px;
  --container-padding: 2rem;
  --section-padding: 6rem 0;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent-strong);
  text-decoration: none;
}

a:hover {
  color: var(--text);
}

a:focus-visible,
.btn:focus-visible,
.nav-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

h1,
h2,
h3 {
  color: var(--text);
  font-weight: 520;
  letter-spacing: 0;
  line-height: 1.08;
  margin: 0;
}

h1 {
  font-size: clamp(3rem, 8vw, 6.5rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3.75rem);
}

h3 {
  font-size: clamp(1.1rem, 2vw, 1.45rem);
}

p {
  color: var(--text-muted);
  margin: 0;
}

.site-header {
  background: rgba(5, 7, 11, 0.88);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
}

.header-inner {
  align-items: center;
  display: flex;
  justify-content: space-between;
  min-height: 76px;
}

.brand {
  color: var(--text) !important;
  font-size: 1rem;
  font-weight: 650;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.site-nav {
  align-items: center;
  display: flex;
  gap: 1.35rem;
}

.nav-link {
  color: var(--text-muted) !important;
  font-size: 0.92rem;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text) !important;
}

.nav-link.active {
  box-shadow: inset 0 -1px 0 var(--accent);
}

.btn {
  align-items: center;
  border: 1px solid transparent;
  border-radius: var(--radius);
  display: inline-flex;
  font-size: 0.95rem;
  font-weight: 650;
  justify-content: center;
  min-height: 46px;
  padding: 0.78rem 1.15rem;
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.btn-primary {
  background: var(--accent);
  color: #080a0d;
}

.btn-primary:hover {
  background: var(--accent-strong);
  color: #080a0d;
}

.btn-secondary,
.btn-outline {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.btn-secondary:hover,
.btn-outline:hover {
  background: rgba(242, 239, 232, 0.06);
  border-color: var(--border-strong);
  color: var(--text);
}

.btn-large {
  min-height: 50px;
  padding: 0.9rem 1.25rem;
}

.hero {
  border-bottom: 1px solid var(--border);
  padding: 8rem 0 7rem;
}

.hero-grid {
  align-items: end;
  display: grid;
  gap: 4rem;
  grid-template-columns: minmax(0, 1fr) 280px;
}

.hero-content {
  max-width: 860px;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  margin-bottom: 1.1rem;
  text-transform: uppercase;
}

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

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  max-width: 680px;
}

.hero-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2.1rem;
}

.hero-aside {
  border-left: 1px solid var(--border);
  padding-left: 1.5rem;
}

.hero-aside p {
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-size: 0.95rem;
  padding: 0.8rem 0;
}

.hero-aside p:first-child {
  padding-top: 0;
}

.hero-aside p:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-hero {
  border-bottom: 1px solid var(--border);
  padding: 7rem 0 5rem;
}

.page-hero .container {
  max-width: 920px;
}

.page-title {
  font-size: clamp(2.75rem, 7vw, 5.5rem);
  margin-bottom: 1.4rem;
}

.page-subtitle {
  font-size: clamp(1.08rem, 2vw, 1.3rem);
  max-width: 720px;
}

.section {
  padding: var(--section-padding);
}

.section-tinted {
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
  border-top: 1px solid var(--border);
}

.section-header {
  margin: 0 auto 3rem;
  max-width: 760px;
  text-align: center;
}

.section-header.align-left {
  margin-left: 0;
  text-align: left;
}

.section-title {
  margin-bottom: 1.3rem;
}

.section-subtitle {
  font-size: 1.12rem;
}

.split-section {
  display: grid;
  gap: 4rem;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1fr);
}

.text-stack {
  display: grid;
  gap: 1.25rem;
}

.text-stack p,
.case-body p,
.product-item p,
.process-list p,
.service-card p,
.process-grid p {
  font-size: 1.03rem;
}

.cards-grid {
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.service-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  min-height: 260px;
  padding: 2rem;
}

.service-card h3 {
  margin-bottom: 1rem;
}

.product-list,
.process-list {
  display: grid;
  gap: 1.5rem;
}

.product-item,
.process-list article {
  border-top: 1px solid var(--border);
  padding-top: 1.35rem;
}

.product-item h3,
.process-list h3 {
  margin-bottom: 0.55rem;
}

.process-grid {
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.process-grid article {
  background: var(--bg);
  border: 1px solid var(--border);
  min-height: 245px;
  padding: 2rem;
}

.process-grid span {
  color: var(--accent);
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 2.8rem;
}

.process-grid h3 {
  margin-bottom: 0.8rem;
}

.case-grid {
  display: grid;
  gap: 2rem;
}

.case-card {
  border-top: 1px solid var(--border-strong);
  display: grid;
  gap: 3rem;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1fr);
  padding-top: 2rem;
}

.case-title {
  font-size: clamp(1.75rem, 3.5vw, 3rem);
}

.case-body {
  display: grid;
  gap: 1.1rem;
}

.content-panel {
  border-top: 1px solid var(--border-strong);
  padding-top: 1.5rem;
}

.muted {
  color: var(--text-dim);
}

.posts-layout {
  display: grid;
  gap: 4rem;
  grid-template-columns: 280px minmax(0, 1fr);
}

.posts {
  display: grid;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.post-item {
  align-items: baseline;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  padding: 1.1rem 0;
}

.post-item:first-child {
  padding-top: 0;
}

.post-link {
  color: var(--text);
  font-weight: 620;
}

.post-link:hover {
  color: var(--accent-strong);
}

.post-date {
  color: var(--text-dim);
  font-size: 0.9rem;
  white-space: nowrap;
}

.cta-section {
  background: var(--bg);
  border-top: 1px solid var(--border);
}

.cta-content {
  max-width: 760px;
}

.cta-title {
  font-size: clamp(2.25rem, 5vw, 4.5rem);
  margin-bottom: 1.2rem;
}

.cta-subtitle {
  font-size: 1.12rem;
  max-width: 640px;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}

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

.site-footer p {
  color: var(--text-dim);
  font-size: 0.9rem;
}

@media (max-width: 860px) {
  :root {
    --container-padding: 1.25rem;
    --section-padding: 4.5rem 0;
  }

  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 1rem;
    padding-bottom: 1rem;
    padding-top: 1rem;
  }

  .site-nav {
    gap: 1rem;
  }

  .hero {
    padding: 5.5rem 0 5rem;
  }

  .hero-grid,
  .split-section,
  .case-card,
  .posts-layout {
    grid-template-columns: 1fr;
  }

  .hero-aside {
    border-left: 0;
    border-top: 1px solid var(--border);
    padding-left: 0;
    padding-top: 1rem;
  }

  .cards-grid,
  .process-grid {
    grid-template-columns: 1fr;
  }

  .service-card,
  .process-grid article {
    min-height: 0;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  .site-nav {
    flex-wrap: wrap;
  }

  .hero-actions,
  .cta-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .post-item {
    align-items: flex-start;
    flex-direction: column;
  }
}