/* ===== GLOBAL ===== */
:root {
  --primary: #0a2540;
  --accent: #1a73e8;
  --accent-light: #e8f0fe;
  --text: #1a1a2e;
  --text-light: #555;
  --bg: #ffffff;
  --section-bg: #f8f9fa;
  --border: #e0e0e0;
  --success: #0d7c3d;
}

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

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--text);
  line-height: 1.7;
  background: var(--bg);
}

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

.container { max-width: 900px; margin: 0 auto; padding: 0 24px; }

/* ===== HEADER ===== */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, #1a3a5c 100%);
  color: #fff;
  padding: 56px 0 48px;
  text-align: center;
}

.hero h1 { font-size: 2.2rem; font-weight: 700; margin-bottom: 8px; }
.hero .subtitle { font-size: 1.15rem; opacity: 0.92; margin-bottom: 16px; max-width: 720px; margin-left: auto; margin-right: auto; }
.hero .location { font-size: 0.95rem; opacity: 0.75; margin-bottom: 20px; }

.badge-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-bottom: 20px; }
.badge {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
}

.cta-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 16px; }
.cta {
  display: inline-block;
  padding: 10px 24px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.92rem;
  transition: all 0.2s;
}
.cta-primary { background: var(--accent); color: #fff; }
.cta-primary:hover { background: #1557b0; text-decoration: none; }
.cta-outline { border: 1.5px solid rgba(255,255,255,0.6); color: #fff; }
.cta-outline:hover { background: rgba(255,255,255,0.1); text-decoration: none; }

/* ===== NAV ===== */
.nav-bar {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0;
}
.nav-bar .container {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding-top: 8px;
  padding-bottom: 8px;
}
.nav-bar a {
  padding: 6px 14px;
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-light);
}
.nav-bar a:hover { background: var(--accent-light); color: var(--accent); text-decoration: none; }

/* ===== SECTIONS ===== */
section { padding: 48px 0; }
section:nth-child(even) { background: var(--section-bg); }

.section-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 24px;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--accent);
  display: inline-block;
}

/* ===== VALUE CARDS ===== */
.value-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.value-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  border-left: 4px solid var(--accent);
}
.value-card h3 { font-size: 1.05rem; color: var(--primary); margin-bottom: 8px; }
.value-card p { font-size: 0.9rem; color: var(--text-light); }
.value-card .metric { font-size: 1.6rem; font-weight: 700; color: var(--accent); }

/* ===== EXPERIENCE ===== */
.exp-entry { margin-bottom: 32px; padding-bottom: 24px; border-bottom: 1px solid var(--border); }
.exp-entry:last-child { border-bottom: none; }
.exp-header { display: flex; justify-content: space-between; flex-wrap: wrap; margin-bottom: 6px; }
.exp-title { font-size: 1.05rem; font-weight: 700; color: var(--primary); }
.exp-company { font-size: 0.95rem; color: var(--accent); font-weight: 600; }
.exp-meta { font-size: 0.85rem; color: var(--text-light); margin-bottom: 10px; }
.exp-desc { font-size: 0.9rem; }
.exp-desc ul { padding-left: 20px; }
.exp-desc li { margin-bottom: 6px; }

/* ===== SKILLS TAGS ===== */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 500;
  background: var(--accent-light);
  color: var(--accent);
}
.tag-primary { background: var(--accent); color: #fff; }

/* ===== PUBLICATIONS ===== */
.pub-entry { margin-bottom: 20px; padding: 16px; background: #fff; border-radius: 8px; border: 1px solid var(--border); }
.pub-entry h3 { font-size: 0.95rem; color: var(--primary); margin-bottom: 4px; }
.pub-entry .pub-meta { font-size: 0.82rem; color: var(--text-light); margin-bottom: 8px; }
.pub-entry p { font-size: 0.88rem; }

/* ===== PROJECTS ===== */
.project-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 20px;
  border-top: 4px solid var(--accent);
}
.project-card h3 { font-size: 1rem; color: var(--primary); margin-bottom: 4px; }
.project-card .proj-meta { font-size: 0.82rem; color: var(--text-light); margin-bottom: 12px; }
.project-card ul { padding-left: 18px; font-size: 0.9rem; }
.project-card li { margin-bottom: 5px; }

/* ===== FOOTER ===== */
footer {
  background: var(--primary);
  color: rgba(255,255,255,0.8);
  padding: 32px 0;
  text-align: center;
  font-size: 0.88rem;
}
footer a { color: #80b4ff; }

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
  .hero h1 { font-size: 1.6rem; }
  .hero .subtitle { font-size: 1rem; }
  .value-grid { grid-template-columns: 1fr; }
}