:root {
  --ink: #0d1b2a;
  --ink-2: #1b263b;
  --accent: #f4a261;
  --accent-2: #2a9d8f;
  --text: #333;
  --bg: #fafafa;
  --card: #ffffff;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html,
body {
  scroll-behavior: smooth;
}
body {
  font-family: "Poppins", system-ui, -apple-system, Segoe UI, Roboto, Arial,
    sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

/* Layout */
.container {
  width: min(1100px, 92%);
  margin-inline: auto;
}
.section {
  padding: 72px 0;
}
.muted {
  color: #5b5b5b;
}
.pub-date {
  opacity: 0.85;
  margin-left: 0.25rem;
}

/* Header & Nav */
.site-header {
  background: linear-gradient(90deg, var(--ink), var(--ink-2));
  color: #fff;
  padding-bottom: 24px;
  box-shadow: var(--shadow);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}
.logo {
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  font-size: 1.1rem;
  letter-spacing: 0.4px;
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 18px;
}
.nav-links a {
  color: #fff;
  text-decoration: none;
  opacity: 0.95;
}
.nav-links a:hover {
  color: var(--accent);
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.4rem;
  cursor: pointer;
}

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  align-items: center;
  padding: 40px 0;
}
.avatar {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--accent);
  box-shadow: var(--shadow);
  background: #eee;
}
.hero h1 {
  color: #fff;
  font-size: clamp(1.4rem, 2.6vw, 2.2rem);
}
.tagline {
  color: #e8e8e8;
  margin-top: 6px;
}
.cta {
  margin-top: 14px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 600;
  border-radius: 999px;
  padding: 10px 18px;
  transition: 0.2s transform, 0.2s filter;
}
.btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}
.primary {
  background: var(--accent);
  color: #fff;
}
.secondary {
  background: var(--accent-2);
  color: #fff;
}

/* Sections */
h2 {
  font-size: clamp(1.3rem, 2.2vw, 1.8rem);
  color: var(--ink);
  margin-bottom: 14px;
}
.card {
  background: var(--card);
  border-left: 5px solid var(--accent);
  padding: 18px 18px 12px;
  margin: 16px 0;
  border-radius: 14px;
  box-shadow: var(--shadow);
}
.card-head {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 8px;
}
.card h3 {
  font-size: 1.05rem;
  color: var(--ink-2);
}
.meta {
  color: #6a6a6a;
  font-size: 0.95rem;
}
.card-list {
  padding-left: 18px;
  display: grid;
  gap: 6px;
  list-style: disc;
}

/* Skills chips */
.chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}
.chips li {
  background: var(--accent);
  color: #fff;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.92rem;
  box-shadow: var(--shadow);
}

/* Publications */
.pub {
  position: relative;
  background: var(--card);
  padding: 18px;
  border-radius: 14px;
  box-shadow: var(--shadow);
  margin: 16px 0;
}
.pub h3 a {
  color: var(--ink-2);
  text-decoration: none;
}
.pub h3 a:hover {
  color: var(--accent);
}
.pub-badge {
  position: absolute;
  top: -10px;
  right: -10px;
  background: var(--accent-2);
  color: #fff;
  font-size: 0.75rem;
  padding: 6px 10px;
  border-radius: 999px;
  box-shadow: var(--shadow);
}

/* Contact */
.contact-grid {
  display: grid;
  gap: 6px;
}
#contact a {
  color: var(--ink-2);
}

/* Footer */
.footer {
  padding: 24px 0;
  text-align: center;
  color: #7b7b7b;
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(24px);
}
.reveal.visible {
  opacity: 1;
  transform: none;
  transition: opacity 0.7s ease, transform 0.7s ease;
}

/* Responsive */
@media (max-width: 860px) {
  .hero {
    grid-template-columns: 80px 1fr;
  }
  .avatar {
    width: 80px;
    height: 80px;
  }
}
@media (max-width: 720px) {
  .nav-toggle {
    display: block;
  }
  .nav-links {
    position: absolute;
    inset: 60px 0 auto 0;
    background: var(--ink-2);
    display: none;
    flex-direction: column;
    padding: 12px 20px;
    box-shadow: var(--shadow);
  }
  .nav-links.show {
    display: flex;
  }
}