:root {
  --color-bg: #f5f7fa;
  --color-surface: #ffffff;
  --color-ink: #16222e;
  --color-ink-soft: #4a5a68;
  --color-primary: #1b3a5c;
  --color-primary-light: #3a5a7a;
  --color-accent: #ff6b35;
  --color-border: #e1e6eb;
  --radius: 10px;
  --max-width: 1140px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0f1620;
    --color-surface: #16202c;
    --color-ink: #e9edf1;
    --color-ink-soft: #a9b6c2;
    --color-border: #263241;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-border);
}
@media (prefers-color-scheme: dark) {
  .site-header { background: rgba(15, 22, 32, 0.85); }
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.04em;
  font-size: 0.95rem;
  color: var(--color-primary);
}
@media (prefers-color-scheme: dark) { .brand { color: #8fc1ff; } }

.brand-mark {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-primary-light));
  display: inline-block;
}

.main-nav {
  display: flex;
  gap: 28px;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-ink-soft);
  transition: color 0.15s ease;
}
.main-nav a:hover { color: var(--color-accent); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-ink);
  border-radius: 2px;
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, #0f2238 0%, #1b3a5c 55%, #214a73 100%);
  color: #fff;
  padding: 120px 0 96px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  opacity: 0.55;
  z-index: 0;
}
.hero-bg svg { width: 100%; height: 100%; }

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 820px;
}

.hero-eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-accent);
  margin: 0 0 16px;
}

.hero-title {
  font-size: clamp(1.9rem, 4vw, 2.9rem);
  font-weight: 800;
  line-height: 1.25;
  margin: 0 0 20px;
}

.hero-sub {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.82);
  max-width: 620px;
  margin: 0 0 36px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.btn-primary {
  background: var(--color-accent);
  color: #fff;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(255, 107, 53, 0.35); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #fff;
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.16); }

/* Sections */
.section { padding: 88px 0; }
.section-alt { background: var(--color-surface); }

.section-eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-accent);
  margin: 0 0 10px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 800;
  margin: 0 0 20px;
  color: var(--color-primary);
}
@media (prefers-color-scheme: dark) { .section-title { color: #8fc1ff; } }

.section-lede {
  max-width: 680px;
  color: var(--color-ink-soft);
  margin: 0 0 40px;
  font-size: 1.02rem;
}

/* Overview */
.overview-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: start;
}
.overview-text p { color: var(--color-ink-soft); margin: 0 0 18px; }

.overview-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 24px;
}
.overview-points li {
  display: flex;
  gap: 16px;
}
.point-index {
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--color-accent);
  flex-shrink: 0;
  width: 28px;
}
.overview-points h3 {
  margin: 0 0 4px;
  font-size: 1.02rem;
  color: var(--color-ink);
}
.overview-points p { margin: 0; color: var(--color-ink-soft); font-size: 0.92rem; }

/* Pipeline */
.pipeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.pipeline-step {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 22px;
}
.pipeline-icon {
  width: 44px;
  height: 44px;
  color: var(--color-accent);
  margin-bottom: 18px;
}
.pipeline-icon svg { width: 100%; height: 100%; }
.pipeline-step h3 {
  font-size: 1rem;
  margin: 0 0 8px;
  color: var(--color-primary);
}
@media (prefers-color-scheme: dark) { .pipeline-step h3 { color: #8fc1ff; } }
.pipeline-step p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-ink-soft);
}

/* Team */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.team-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 22px;
  text-align: center;
}
.avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
}
.team-card h3 { margin: 0 0 4px; font-size: 1rem; }
.team-role { margin: 0; font-size: 0.88rem; color: var(--color-ink-soft); }
.team-affil { margin: 4px 0 0; font-size: 0.82rem; color: var(--color-ink-soft); opacity: 0.8; }

/* News */
.news-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
  max-width: 760px;
}
.news-list li {
  display: flex;
  gap: 20px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--color-border);
}
.news-list li:last-child { border-bottom: none; padding-bottom: 0; }
.news-date {
  flex-shrink: 0;
  width: 64px;
  font-weight: 700;
  color: var(--color-accent);
  font-size: 0.9rem;
}
.news-list h3 { margin: 0 0 6px; font-size: 1rem; }
.news-list p { margin: 0; color: var(--color-ink-soft); font-size: 0.92rem; }

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}
.contact-details {
  margin: 28px 0 0;
  display: grid;
  gap: 18px;
}
.contact-details dt {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-soft);
  margin-bottom: 4px;
}
.contact-details dd { margin: 0; font-weight: 600; }

.contact-form {
  display: grid;
  gap: 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
}
.contact-form label {
  display: grid;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-ink-soft);
}
.contact-form input,
.contact-form textarea {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-ink);
  resize: vertical;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}
.contact-form button { justify-self: start; border: none; cursor: pointer; }
.form-note { margin: 0; font-size: 0.86rem; color: var(--color-accent); min-height: 1.2em; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 28px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.82rem;
  color: var(--color-ink-soft);
}
.back-to-top { text-decoration: none; font-weight: 600; }

/* Responsive */
@media (max-width: 900px) {
  .overview-grid, .contact-grid { grid-template-columns: 1fr; }
  .pipeline { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 680px) {
  .main-nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: 12px 24px 20px;
    gap: 14px;
    display: none;
  }
  .main-nav.open { display: flex; }
  .nav-toggle { display: flex; }
  .pipeline { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .hero { padding: 100px 0 72px; }
}