:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-alt: #eef4ff;
  --primary: #1d4ed8;
  --primary-dark: #173ea8;
  --text: #172033;
  --muted: #5e6b85;
  --border: #dfe7f5;
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(180deg, #eef4ff 0%, #f8fafc 18%, #f4f7fb 100%);
  color: var(--text);
}

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

 a {
  color: inherit;
  text-decoration: none;
}

.page-shell {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(223, 231, 245, 0.9);
  border-radius: 18px;
  backdrop-filter: blur(10px);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.04);
  position: sticky;
  top: 16px;
  z-index: 10;
}

.brand {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), #6aa9ff);
  color: white;
  display: grid;
  place-items: center;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.nav {
  display: flex;
  gap: 18px;
  font-size: 0.96rem;
  color: var(--muted);
}

.nav a {
  transition: color 0.2s ease;
}

.nav a:hover {
  color: var(--primary);
}

.hero {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 30px;
  align-items: center;
  padding: 52px 12px 24px;
}

.eyebrow {
  margin: 0 0 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: clamp(2.6rem, 4vw, 4.4rem);
  line-height: 1.08;
  letter-spacing: -0.06em;
}

.subtitle {
  font-size: 1.18rem;
  color: var(--muted);
  margin: 14px 0 18px;
}

.intro {
  font-size: 1.08rem;
  line-height: 1.9;
  color: var(--text);
  max-width: 580px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px 20px;
}

.cta-row {
  display: flex;
  gap: 14px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.button {
  padding: 12px 20px;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  display: inline-block;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 14px 18px rgba(29, 78, 216, 0.24);
}

.button.secondary {
  background: white;
  border-color: var(--border);
  color: var(--text);
}

.profile-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 24px;
}

.avatar {
  width: 80px;
  height: 80px;
  border-radius: 22px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #dbeafe, #bfdbfe);
  color: var(--primary-dark);
  font-size: 2.1rem;
  font-weight: 700;
  margin-bottom: 22px;
}

.profile-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.profile-card li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.profile-card li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.profile-card span {
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.profile-card strong {
  font-size: 1rem;
  line-height: 1.5;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.panel {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 26px 24px;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.04);
}

.panel h2 {
  margin: 0 0 20px;
  font-size: 1.4rem;
}

.tag-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-list li {
  background: var(--surface-alt);
  color: var(--primary-dark);
  border: 1px solid #d7e7ff;
  padding: 9px 14px;
  border-radius: 999px;
  font-weight: 600;
}

.course-box {
  background: linear-gradient(135deg, #eff6ff 0%, #f8fbff 100%);
  border: 1px solid #d7e7ff;
  border-radius: 18px;
  padding: 18px 20px;
}

.course-label {
  margin: 0 0 8px;
  color: var(--primary);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.72rem;
}

.course-box h3 {
  margin: 0 0 8px;
  font-size: 1.4rem;
}

.course-box p:last-child {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.contact-panel {
  margin-top: 24px;
}

.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.contact-list li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

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

.contact-list span {
  color: var(--muted);
  font-weight: 600;
}

.contact-list a {
  color: var(--primary);
  font-weight: 600;
}

@media (max-width: 760px) {
  .topbar {
    flex-direction: column;
    gap: 14px;
  }

  .nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero,
  .info-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 32px;
  }

  .contact-list li {
    flex-direction: column;
    align-items: flex-start;
  }
}