/* test.aip.ci — ringan, mobile-first, Core Web Vitals aware */
:root {
  --bg: #0b0f14;
  --surface: #121922;
  --border: #1e2a3a;
  --text: #e8edf4;
  --muted: #8b9cb3;
  --accent: #3d8bfd;
  --accent-2: #22d3a3;
  --radius: 12px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --max: 72rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--accent-2);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 0.75rem 1rem;
  background: var(--accent);
  color: #fff;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 15, 20, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
  flex-wrap: wrap;
}

.logo {
  display: inline-flex;
  align-items: center;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

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

.logo:hover {
  color: var(--accent-2);
}

.nav-main {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  align-items: center;
}

.nav-main a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 0.25rem 0;
}

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

.nav-toggle {
  display: none;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.85rem;
}

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

  .nav-main {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding-bottom: 0.5rem;
  }

  .nav-main.is-open {
    display: flex;
  }
}

.hero {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
  border-bottom: 1px solid var(--border);
}

.hero-banner {
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 1.75rem;
  aspect-ratio: 21 / 9;
  min-height: 160px;
  background: linear-gradient(135deg, #0d2137 0%, #122a1f 45%, #1a1030 100%);
  border: 1px solid var(--border);
  position: relative;
}

.hero-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 70% 40%, rgba(61, 139, 253, 0.25), transparent);
  pointer-events: none;
}

.hero-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.15;
  margin: 0 0 1rem;
  letter-spacing: -0.03em;
}

.lead {
  font-size: 1.125rem;
  color: var(--muted);
  max-width: 42rem;
  margin: 0 0 1.5rem;
}

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

.btn {
  display: inline-block;
  padding: 0.65rem 1.15rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  border: 1px solid transparent;
}

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

.btn-primary:hover {
  background: #2a7ae8;
  color: #fff;
}

.btn-ghost {
  border-color: var(--border);
  color: var(--text);
  background: var(--surface);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent-2);
}

section {
  padding: clamp(2rem, 5vw, 3.5rem) 0;
}

section + section {
  border-top: 1px solid var(--border);
}

h2 {
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}

h3 {
  font-size: 1.15rem;
  margin: 1.5rem 0 0.5rem;
}

.prose p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.prose p strong {
  color: var(--text);
}

.card-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-top: 1.25rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: border-color 0.2s;
}

.card:hover {
  border-color: rgba(61, 139, 253, 0.45);
}

.card h3 {
  margin-top: 0;
  font-size: 1.05rem;
}

.card p {
  font-size: 0.95rem;
  color: var(--muted);
  margin: 0 0 1rem;
}

.card a:last-child {
  font-weight: 600;
  font-size: 0.9rem;
}

.bullets {
  margin: 1rem 0;
  padding-left: 1.25rem;
  color: var(--muted);
}

.bullets li {
  margin-bottom: 0.5rem;
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0 0 1.25rem;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.5rem;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 0.5rem;
  opacity: 0.5;
}

.breadcrumb a {
  color: var(--muted);
}

.breadcrumb a:hover {
  color: var(--accent-2);
}

.page-hero-banner {
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 1.5rem;
  aspect-ratio: 21 / 8;
  min-height: 140px;
  border: 1px solid var(--border);
}

.page-hero-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.banner-insight {
  background: linear-gradient(120deg, #152238, #0f2840, #1a2040);
}

.banner-strategy {
  background: linear-gradient(120deg, #1a2530, #142828, #1e2238);
}

.banner-technology {
  background: linear-gradient(120deg, #0f2235, #12202a, #251a35);
}

.banner-analysis {
  background: linear-gradient(120deg, #14202c, #1a2438, #0f3030);
}

.banner-update {
  background: linear-gradient(120deg, #1c2030, #251c28, #152838);
}

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

.footer-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.site-footer h2 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

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

.footer-links li {
  margin-bottom: 0.4rem;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--accent-2);
}

.copyright {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
}