:root {
  --bg: #f7f8fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-soft: #dbeafe;
  --border: #e5e7eb;
  --shadow: 0 20px 45px rgba(15, 23, 42, 0.08);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.navbar {
  max-width: 1120px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 20px;
  font-weight: 800;
  color: var(--text);
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--muted);
  font-weight: 600;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 88px 24px;
}

.about-section {
  min-height: calc(100vh - 72px);
  display: flex;
  align-items: center;
}

.about-container {
  width: 100%;
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 56px;
  align-items: center;
}

.profile-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 26px;
  box-shadow: var(--shadow);
  text-align: center;
}

.profile-photo {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 24px;
  border: 1px solid var(--border);
  background: #eef2ff;
}

.role-list {
  margin-top: 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.role-badge {
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 700;
  font-size: 14px;
}

.section-label {
  color: var(--primary);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 14px;
}

.about-content h1 {
  font-size: clamp(38px, 6vw, 64px);
  line-height: 1.08;
  margin-bottom: 22px;
}

.about-content h1 span {
  color: var(--primary);
}

.intro-text {
  max-width: 720px;
  color: var(--muted);
  font-size: 18px;
  margin-bottom: 34px;
}

.info-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 20px;
}

.info-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 24px;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.04);
}

.info-box h2 {
  font-size: 18px;
  margin-bottom: 12px;
}

.info-box p,
.info-box li {
  color: var(--muted);
}

.info-box ul {
  padding-left: 18px;
}

.placeholder-section {
  border-top: 1px solid var(--border);
}

.placeholder-section h2 {
  font-size: 32px;
  margin-bottom: 12px;
}

.placeholder-section p {
  color: var(--muted);
}

.footer {
  padding: 28px 24px;
  text-align: center;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

@media (max-width: 860px) {
  .navbar {
    align-items: flex-start;
    gap: 16px;
    flex-direction: column;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 16px;
  }

  .about-container {
    grid-template-columns: 1fr;
  }

  .profile-card {
    max-width: 360px;
  }

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