:root {
  --sky: #9EBED3;
  --sky-dark: #4E82A3;
  --sky-deep: #2E5C77;
  --sky-light: #DCEAF2;
  --ink: #1F2E38;
  --ink-soft: #4A5A66;
  --paper: #FBFCFD;
  --card: #FFF;
  --border: #E2E9EE;
  --shadow: 0 8px 20px rgb(31 46 56 / 7%);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Helvetica, Arial, sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.65;
}

header {
  padding: 42px 20px 32px;
  text-align: center;
  background: var(--sky-light);
  border-bottom: 3px solid var(--sky);
}

h1 {
  font-size: 2.2rem;
  margin: 0;
  letter-spacing: -0.02em;
}

.subtitle {
  font-size: 0.95rem;
  color: var(--sky-deep);
  margin-top: 6px;
  font-weight: 600;
}

.dot {
  color: var(--sky-dark);
  margin: 0 8px;
}

main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 20px 10px;
}

section {
  margin-bottom: 42px;
}

h2 {
  font-size: 1.4rem;
  margin: 0 0 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

h2::before {
  content: "";
  width: 22px;
  height: 5px;
  border-radius: 4px;
  background: var(--sky-dark);
  display: inline-block;
}

.about-card,
.contact-card,
.publication-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--sky);
  border-radius: 12px;
  padding: 22px 26px;
  box-shadow: var(--shadow);
}

.about-card p,
.publication-card p,
.contact-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1rem;
}

.projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}

.card {
  background: var(--card);
  padding: 20px 22px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  border-top: 5px solid var(--sky-dark);
}

.card h3,
.publication-card h3 {
  margin-top: 0;
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 1.1rem;
}

.card p {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.tag {
  display: inline-block;
  background: var(--sky);
  color: #fff;
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  margin-right: 6px;
  margin-bottom: 6px;
}

.dashboard {
  margin-top: 22px;
  background: white;
  border-radius: 12px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  overflow: hidden;
}

.dashboard iframe {
  width: 100%;
  height: 720px;
  border: none;
  display: block;
}

.contact-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.contact-link {
  color: var(--sky-deep);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
}

a {
  color: var(--sky-deep);
  text-decoration: none;
  font-weight: 600;
}

a:hover {
  text-decoration: underline;
}

footer {
  text-align: center;
  padding: 20px 20px 26px;
}

.copyright {
  color: var(--ink-soft);
  font-size: 0.8rem;
  margin: 0;
}

@media (width <= 700px) {
  .dashboard iframe {
    height: 520px;
  }

  h1 {
    font-size: 2rem;
  }
}