/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --fg: #1a1a1a;
  --fg-dim: #555;
  --fg-muted: #888;
  --bg: #faf9f7;
  --bg-card: #fff;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --border: #e8e6e1;
  --radius: 8px;
  --font-body: 'Source Serif 4', Georgia, serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;
  --max-w: 740px;
}

html {
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  color: var(--fg);
  background: var(--bg);
  line-height: 1.7;
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.15s;
}
a:hover { color: var(--accent-hover); }

/* ── Navigation ── */
nav {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 0;
  display: flex;
  gap: 1.8rem;
}

nav a {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--fg-muted);
  text-decoration: none;
  letter-spacing: 0.02em;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
nav a:hover { color: var(--fg); }
nav a.nav-active {
  color: var(--fg);
  border-bottom-color: var(--fg);
}

/* ── Main Content ── */
main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 5rem;
}

h1 {
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.flags {
  display: block;
  font-size: 1.1rem;
  letter-spacing: 0.3em;
  margin-bottom: 1.8rem;

  font-family: "Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji",sans-serif;
  font-variant-emoji: emoji;
}

/* ── About Page ── */
.about-content {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  margin-bottom: 2.5rem;
}

.portrait {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 3px solid var(--border);
}

.bio p {
  margin-bottom: 1rem;
  color: var(--fg);
}
.bio p:last-child { margin-bottom: 0; }
.bio strong { font-weight: 600; }

.links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.links a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--fg-dim);
  text-decoration: none;
  padding: 0.5rem 0;
  transition: color 0.15s;
}
.links a:hover { color: var(--fg); }
.links a svg { opacity: 0.6; transition: opacity 0.15s; }
.links a:hover svg { opacity: 1; }

/* ── Projects Page ── */
main section {
  margin-bottom: 3rem;
}

h2 {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
  margin-bottom: 1.2rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

/* ── Project Grid ── */
.project-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.project-grid li a {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s, box-shadow 0.2s;
}

.project-grid li a:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  color: inherit;
}

.project-grid li img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  display: block;
  border-bottom: 1px solid var(--border);
}

.project-grid li h3 {
  font-size: 1.15rem;
  font-weight: 700;
  padding: 1rem 1.2rem 0;
  line-height: 1.3;
}

.project-grid li p {
  font-size: 0.9rem;
  color: var(--fg-dim);
  padding: 0.5rem 1.2rem 0;
  line-height: 1.6;
}

.tags {
  display: flex;
  gap: 0.4rem;
  padding: 0.8rem 1.2rem 1.2rem;
  flex-wrap: wrap;
}

.tags span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  background: var(--bg);
  color: var(--fg-muted);
  letter-spacing: 0.02em;
}

/* ── Experience List ── */
.experience-list {
  list-style: none;
}
.experience-list li {
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--border);
}
.experience-list li:last-child { border-bottom: none; }

.exp-role {
  font-weight: 600;
  display: block;
}
.exp-org {
  color: var(--fg-dim);
  font-size: 0.92rem;
}
.exp-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--fg-muted);
  display: block;
  margin-top: 0.2rem;
}
.exp-detail {
  font-size: 0.9rem;
  color: var(--fg-dim);
  display: block;
  margin-top: 0.15rem;
}

/* ── Responsive ── */
@media (max-width: 600px) {
  html { font-size: 16px; }

  .about-content {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .portrait { width: 120px; height: 120px; }

  .links { justify-content: center; }

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

  h1 { font-size: 1.8rem; }
}