:root {
  --bg: #f4f8fb;
  --surface: #ffffff;
  --surface-alt: #eaf1f7;
  --text: #1f2a37;
  --muted: #5f6e80;
  --primary: #0e7490;
  --primary-dark: #0a5a70;
  --border: #d6e0ea;
  --shadow: 0 14px 34px rgba(31, 42, 55, 0.08);
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 0%, #d9eef6 0, transparent 28%),
    radial-gradient(circle at 95% 15%, #dce9f8 0, transparent 32%),
    var(--bg);
  line-height: 1.6;
}

a {
  color: var(--primary-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: min(1080px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
  background: rgba(244, 248, 251, 0.86);
  border-bottom: 1px solid var(--border);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.3px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.nav a {
  padding: 0.4rem 0.6rem;
  border-radius: 8px;
}

.nav a[aria-current="page"],
.nav a:hover {
  background: var(--surface-alt);
  text-decoration: none;
}

.hero {
  padding: 4.8rem 0 3rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

.kicker {
  margin: 0 0 0.35rem;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--primary-dark);
}

h1,
h2,
h3 {
  line-height: 1.2;
  margin-top: 0;
}

h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 0.8rem;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 1rem;
}

.lead {
  color: var(--muted);
  max-width: 70ch;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.35rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  padding: 0.7rem 1rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
}

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

.card,
.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card {
  padding: 1.2rem;
}

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

.meta-list li {
  display: flex;
  flex-direction: column;
  padding: 0.65rem 0;
  border-bottom: 1px dashed var(--border);
}

.meta-list li:last-child {
  border-bottom: 0;
}

.meta-list span {
  font-size: 0.85rem;
  color: var(--muted);
}

.section {
  padding: 3rem 0;
}

.section-alt {
  background: var(--surface-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.chips span {
  background: #d8e8f5;
  border: 1px solid #b8d2e8;
  border-radius: 999px;
  padding: 0.4rem 0.8rem;
  font-weight: 600;
}

.timeline {
  display: grid;
  gap: 1rem;
}

.timeline article {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
}

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

.ats-list {
  margin: 0.6rem 0 0;
  padding-left: 1.2rem;
}

.ats-list li {
  margin-bottom: 0.55rem;
}

.grid-cards {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.post-card {
  padding: 1.1rem;
}

.tag {
  display: inline-block;
  margin: 0;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  background: #dff2ea;
  color: #0f766e;
  font-size: 0.8rem;
  font-weight: 700;
}

.site-footer {
  padding: 1.8rem 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.cert-list {
  display: grid;
  gap: 1rem;
}

.cert-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
}

.cert-item p {
  margin: 0;
  font-weight: 600;
}

.cert-item i {
  font-size: 2rem;
  color: var(--primary);
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 640px) {
  .nav-wrap {
    flex-direction: column;
    align-items: flex-start;
  }

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