:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #5f6368;
  --color-accent: #2454ff;
  --color-border: #e5e7eb;
  --max-width: 860px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

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

/* Header */
.site-header {
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: var(--color-bg);
  z-index: 10;
}

.site-header nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
}

.logo {
  font-weight: 600;
  font-size: 1.05rem;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-text);
  font-size: 0.95rem;
}

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

/* Hero */
.hero {
  padding: 96px 24px 72px;
}

.hero-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
}

.avatar {
  flex-shrink: 0;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: #eef1f6;
  border: 2px solid var(--color-border);
  overflow: hidden;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-text {
  text-align: left;
}

.hero h1 {
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

.hero .subtitle {
  color: var(--color-muted);
  font-size: 1.15rem;
  margin: 0;
}

@media (max-width: 560px) {
  .hero-inner {
    flex-direction: column;
    text-align: center;
  }

  .hero-text {
    text-align: center;
  }
}

/* Sections */
.section {
  padding: 56px 24px;
  border-top: 1px solid var(--color-border);
}

.section h2 {
  font-size: 1.5rem;
  margin: 0 0 12px;
}

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

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 24px 0;
  margin-top: 24px;
}

.site-footer p {
  color: var(--color-muted);
  font-size: 0.9rem;
  margin: 0;
}