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

:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: #1a2233;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --accent-subtle: rgba(59, 130, 246, 0.12);
  --border: #1e293b;
  --radius: 12px;
  --max-width: 1140px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: var(--accent-hover);
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.nav-logo span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  margin: 5px 0;
  transition: 0.3s;
}

/* hero */
.hero {
  padding: 100px 0 80px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 36px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  padding: 14px 32px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.2s, transform 0.15s;
}
.hero-cta:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-1px);
}

.section {
  padding: 80px 0;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  color: var(--text-secondary);
  margin-bottom: 48px;
  font-size: 1.05rem;
}

/* domains */
.domain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.domain-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.25s, transform 0.2s;
}
.domain-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.domain-card .icon {
  width: 44px;
  height: 44px;
  background: var(--accent-subtle);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.3rem;
}

.domain-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.domain-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* case studies */
.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: border-color 0.25s, transform 0.2s;
}
.case-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.case-card .badge {
  display: inline-block;
  background: var(--accent-subtle);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.case-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.case-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

.case-card .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
}

.case-card .tag {
  font-size: 0.72rem;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  padding: 3px 10px;
  border-radius: 4px;
  border: 1px solid var(--border);
}

/* team */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
}

.team-card .avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.8rem;
  font-weight: 700;
  color: #fff;
}

.team-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.team-card .role {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 12px;
}

.team-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

.updates-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.update-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.update-item .date {
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 8px;
}

.update-item h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.update-item p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.case-section-title {
  font-size: 1.1rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 32px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.case-section-title:first-child {
  margin-top: 0;
}

/* research */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.research-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.research-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.research-card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.research-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 12px;
}

.research-focus {
  list-style: none;
  padding: 0;
  margin: 0 0 14px;
}

.research-focus li {
  color: var(--text-secondary);
  font-size: 0.85rem;
  padding: 4px 0 4px 16px;
  position: relative;
}

.research-focus li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.case-card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 16px;
}

.team-photo {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 20px;
}

.company-info {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 40px;
}

.company-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

.company-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}

.meta-item {
  flex: 1;
  min-width: 240px;
}

.meta-item strong {
  display: block;
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.meta-item span {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

.hero-bg {
  background-size: cover;
  background-position: center;
  position: relative;
}

.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,14,23,0.85) 0%, rgba(10,14,23,0.95) 100%);
}

.hero-bg .container {
  position: relative;
  z-index: 1;
}

/* modal */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  z-index: 1000;
  overflow-y: auto;
  padding: 40px 20px;
  justify-content: center;
  align-items: flex-start;
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 720px;
  width: 100%;
  padding: 32px;
  position: relative;
  margin: auto;
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.8rem;
  cursor: pointer;
  line-height: 1;
  padding: 4px 8px;
  transition: color 0.2s;
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-img {
  width: 100%;
  border-radius: 8px;
  margin-bottom: 20px;
  max-height: 400px;
  object-fit: cover;
}

.modal-content h2 {
  margin: 12px 0 8px;
  font-size: 1.4rem;
}

.modal-content p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.loading {
  text-align: center;
  padding: 40px;
  color: var(--text-secondary);
}

.loading::after {
  content: "";
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-left: 8px;
  vertical-align: middle;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* mobile */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 20px 24px;
    gap: 16px;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-toggle {
    display: block;
  }
  .hero {
    padding: 60px 0 50px;
  }
  .domain-grid,
  .case-grid,
  .team-grid {
    grid-template-columns: 1fr;
  }
}