:root {
  --bg: #f4f8fc;
  --surface: #ffffff;
  --surface-soft: #edf4fb;
  --ink: #0e1f35;
  --muted: #49627d;
  --primary: #0f5c99;
  --accent: #1b9aaa;
  --line: #d8e5f2;
  --shadow-soft: 0 10px 24px rgba(9, 37, 66, 0.08);
  --shadow-strong: 0 18px 40px rgba(11, 44, 79, 0.12);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Manrope", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(900px 500px at 88% 8%, rgba(27, 154, 170, 0.18), transparent 60%),
    radial-gradient(780px 420px at 10% 90%, rgba(15, 92, 153, 0.16), transparent 60%),
    var(--bg);
  line-height: 1.55;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
  background: rgba(244, 248, 252, 0.9);
}

.topbar-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-family: "Fraunces", serif;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.2px;
}

.menu {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.95rem;
  color: var(--muted);
  font-weight: 600;
}

.menu a:hover,
.menu a.active {
  color: var(--primary);
}

.page-title {
  font-family: "Fraunces", serif;
  font-size: clamp(2rem, 4.2vw, 3.2rem);
  line-height: 1.05;
  margin: 0;
}

.section-title {
  margin: 0 0 0.8rem;
  font-family: "Fraunces", serif;
  font-size: 1.75rem;
  color: #0d2e4f;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary);
  border: 1px solid #bdd6eb;
  border-radius: 999px;
  background: #edf5fd;
  padding: 0.38rem 0.7rem;
}

.lead {
  color: var(--muted);
  font-size: 1.05rem;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.5rem;
  align-items: center;
  padding: 2.4rem 0 1.2rem;
}

.avatar-card {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow-strong);
  padding: 1rem;
}

.avatar {
  display: block;
  width: 100%;
  max-height: 430px;
  object-fit: cover;
  border-radius: 14px;
  border: 1px solid #d7e6f4;
}

.caption {
  margin-top: 0.8rem;
  color: #3d5872;
  font-size: 0.92rem;
}

.grid {
  display: grid;
  gap: 1rem;
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow-soft);
  padding: 1rem;
}

.card h3,
.card h4 {
  margin: 0 0 0.45rem;
  color: #10395f;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.badge {
  display: inline-block;
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  font-size: 0.76rem;
  font-weight: 700;
  background: #eaf4ff;
  color: #0f5c99;
  border: 1px solid #c8dff3;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin: 1rem 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.62rem 1rem;
  font-weight: 700;
  font-size: 0.92rem;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(120deg, #0f5c99, #1877b6);
  box-shadow: 0 10px 24px rgba(15, 92, 153, 0.25);
}

.btn-secondary {
  color: #12395e;
  background: #fff;
  border-color: #c6d9ec;
}

.socials {
  display: flex;
  gap: 0.7rem;
}

.socials a {
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  border: 1px solid #cfe0ef;
  background: #fff;
  color: #16456f;
}

.socials a:hover {
  color: var(--primary);
  border-color: #8db7d9;
}

.main-block {
  padding: 0.8rem 0 2.2rem;
}

.list {
  margin: 0;
  padding-left: 1rem;
  color: var(--muted);
}

.list li {
  margin: 0.45rem 0;
}

.timeline {
  display: grid;
  gap: 0.95rem;
}

.timeline .card {
  border-left: 4px solid #2f7bb5;
}

.project-image,
.paper-image {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid #d8e6f3;
  margin-bottom: 0.75rem;
}

.footer {
  padding: 1.4rem 0 2rem;
  border-top: 1px solid var(--line);
  color: #5f7993;
  text-align: center;
  font-size: 0.9rem;
}

@media (max-width: 960px) {
  .hero,
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .topbar-inner {
    padding: 0.35rem 0;
  }
}