:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #5c5c5c;
  --color-border: #e0e0e0;
  --color-accent: #2f6a4f;
  --font-serif: "Georgia", "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
  --max-width: 720px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-serif);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  font-size: 18px;
}

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

h1, h2, h3 {
  font-weight: 400;
  line-height: 1.25;
}

h1 {
  font-size: 2.4rem;
  margin: 0 0 12px;
}

h2 {
  font-size: 1.5rem;
  margin: 0 0 24px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

p {
  color: var(--color-text);
}

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

a:hover {
  text-decoration: underline;
}

/* Header */

.site-header {
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  padding-bottom: 20px;
}

.site-name {
  font-size: 1.1rem;
  letter-spacing: 0.02em;
}

.lang-toggle {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 6px 14px;
  border-radius: 999px;
  cursor: pointer;
}

.lang-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Sections */

.section {
  padding: 56px 0;
  border-bottom: 1px solid var(--color-border);
}

.section:last-of-type {
  border-bottom: none;
}

.hero {
  padding-top: 72px;
  padding-bottom: 72px;
}

.claim {
  font-size: 1.15rem;
  color: var(--color-muted);
  max-width: 540px;
}

/* Timeline */

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--color-accent);
}

.timeline-item {
  position: relative;
  padding: 0 0 28px 28px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
}

.timeline-date {
  display: block;
  font-size: 0.85rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.timeline-title {
  display: block;
  font-size: 1.05rem;
}

/* Badges */

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

.badge {
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.9rem;
}

/* Projects */

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.project-card {
  border: 1px solid var(--color-border);
  padding: 20px;
  border-radius: 6px;
}

.project-card h3 {
  font-size: 1.1rem;
  margin: 0 0 8px;
}

.project-card p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.95rem;
}

/* Contact */

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

.contact-list li {
  margin-bottom: 8px;
  font-size: 1.05rem;
}

/* Footer */

.site-footer {
  padding: 32px 0;
}

.site-footer p {
  color: var(--color-muted);
  font-size: 0.85rem;
  margin: 0;
}

/* Responsive */

@media (max-width: 600px) {
  body {
    font-size: 16px;
  }

  h1 {
    font-size: 1.9rem;
  }

  .section {
    padding: 40px 0;
  }

  .hero {
    padding-top: 48px;
    padding-bottom: 48px;
  }
}