/* Sable Institute — Corporate Site */

:root {
  --si-dark: #1a1a2e;
  --si-mid: #16213e;
  --si-accent: #0f3460;
  --si-highlight: #e94560;
  --si-text: #c4c4c4;
  --si-text-light: #8a8a9a;
  --si-white: #eaeaea;
  --si-bg: #0d0d1a;
  --si-border: #2a2a3e;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--si-bg);
  color: var(--si-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Navigation */
.si-nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 100;
  background: rgba(13, 13, 26, 0.95);
  border-bottom: 1px solid var(--si-border);
  backdrop-filter: blur(10px);
}

.si-nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.si-logo {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--si-white);
  text-decoration: none;
}

.si-nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.si-nav-links a {
  color: var(--si-text-light);
  text-decoration: none;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.2s;
}

.si-nav-links a:hover {
  color: var(--si-white);
}

/* Hero */
.si-hero {
  padding: 10rem 2rem 6rem;
  max-width: 1100px;
  margin: 0 auto;
}

.si-hero h1 {
  font-size: 2.4rem;
  font-weight: 300;
  color: var(--si-white);
  letter-spacing: 0.02em;
  margin-bottom: 1.5rem;
}

.si-hero .si-subtitle {
  font-size: 1rem;
  color: var(--si-text-light);
  max-width: 600px;
  line-height: 1.8;
}

.si-divider {
  width: 60px;
  height: 1px;
  background: var(--si-accent);
  margin: 3rem 0;
}

/* Sections */
.si-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.si-section-label {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--si-text-light);
  margin-bottom: 2rem;
}

.si-section h2 {
  font-size: 1.6rem;
  font-weight: 400;
  color: var(--si-white);
  margin-bottom: 1.5rem;
}

.si-section p {
  color: var(--si-text);
  max-width: 700px;
  margin-bottom: 1.2rem;
  font-size: 0.95rem;
}

/* Research Grid */
.si-research-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

.si-research-card {
  background: var(--si-dark);
  border: 1px solid var(--si-border);
  padding: 2rem;
  transition: border-color 0.2s;
}

.si-research-card:hover {
  border-color: var(--si-accent);
}

.si-research-card h3 {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--si-white);
  margin-bottom: 0.8rem;
}

.si-research-card p {
  font-size: 0.85rem;
  color: var(--si-text-light);
  line-height: 1.6;
}

/* Careers */
.si-careers-list {
  list-style: none;
  margin-top: 1.5rem;
}

.si-careers-list li {
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--si-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.si-careers-list li:last-child {
  border-bottom: none;
}

.si-position-title {
  font-size: 0.9rem;
  color: var(--si-white);
}

.si-position-dept {
  font-size: 0.8rem;
  color: var(--si-text-light);
}

/* Contact */
.si-contact-info {
  margin-top: 1.5rem;
}

.si-contact-info p {
  font-size: 0.9rem;
  color: var(--si-text-light);
}

.si-contact-info a {
  color: var(--si-text);
  text-decoration: none;
  border-bottom: 1px solid var(--si-border);
  transition: border-color 0.2s;
}

.si-contact-info a:hover {
  border-color: var(--si-text);
}

/* Footer */
.si-footer {
  max-width: 1100px;
  margin: 0 auto;
  padding: 3rem 2rem;
  border-top: 1px solid var(--si-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--si-text-light);
}

/* Responsive */
@media (max-width: 768px) {
  .si-research-grid {
    grid-template-columns: 1fr;
  }

  .si-nav-links {
    gap: 1.5rem;
  }

  .si-hero h1 {
    font-size: 1.8rem;
  }
}