:root {
  --bg: #141d33;
  --card: #18223a;
  --muted: #b0bccf;
  --accent: #8b5cf6;
  --glass: rgba(255, 255, 255, 0.07);
  --maxw: 1100px;
  --radius: 14px;
}

* {
  box-sizing: border-box;
  scroll-behavior: smooth;
}

html,
body {
  height: 100%;
  margin: 0;
  font-family: Inter, system-ui, Segoe UI, Roboto, "Helvetica Neue", Arial;
  background: linear-gradient(180deg, #101c36 0%, #0f213f 60%);
  color: #f2f6fc;
}

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

.wrap {
  max-width: var(--maxw);
  margin: 20px auto;
  padding: 28px;
}

/* header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(180deg, rgba(16, 28, 54, 0.98) 0%, rgba(15, 33, 63, 0.95) 100%);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  margin: -28px -28px 20px -28px;
  padding: 16px 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.brand {
  display: flex;
  gap: 16px;
  align-items: center;
  cursor: pointer;
  transition: opacity 0.2s;
}

.brand:hover {
  opacity: 0.8;
}

.logo {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), #06b6d4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  overflow: hidden;
}

.logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.nav {
  display: flex;
  gap: 16px;
  align-items: center;
}

.btn {
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-weight: 600;
  transition: background 0.2s;
}

.btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* hero */
.hero {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 32px;
  margin-top: 28px;
}

.card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
  padding: 28px;
  border-radius: var(--radius);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.headline {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.05;
  margin: 0;
}

.sub {
  color: var(--muted);
  margin-top: 10px;
}

.skills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.chip {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-weight: 600;
}

/* right column */
.profile {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  text-align: center;
}

.avatar {
  width: 160px;
  height: 160px;
  border-radius: 28px;
  background: linear-gradient(180deg, #1d3052, #0d1e38);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 42px;
  color: var(--accent);
  font-weight: 800;
  border: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.statgrid {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.stat {
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
}

.contact {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.social {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* sections */
section {
  margin-top: 28px;
  scroll-margin-top: 140px;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.projects {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.proj {
  padding: 16px;
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(255, 255, 255, 0.08);
}

footer {
  margin-top: 40px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  padding-bottom: 40px;
}

.kbd {
  background: rgba(255, 255, 255, 0.07);
  padding: 6px 8px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-weight: 700;
}

/* responsive */
@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .header {
    flex-direction: column;
    align-items: flex-start;
    margin: -18px -18px 20px -18px;
    padding: 16px 18px;
  }

  .wrap {
    margin: 10px auto;
    padding: 18px;
  }

  .profile {
    order: -1;
  }
}

@media (max-width: 640px) {
  .wrap {
    margin: 0 auto;
    padding: 14px;
  }

  .header {
    margin: -14px -14px 16px -14px;
    padding: 12px 14px;
    gap: 14px;
  }

  .nav {
    width: 100%;
    justify-content: space-between;
    gap: 8px;
  }

  .btn {
    padding: 8px 12px;
    font-size: 14px;
    flex: 1;
    text-align: center;
  }

  .headline {
    font-size: 22px;
  }

  .card {
    padding: 18px;
  }

  .avatar {
    width: 120px;
    height: 120px;
    border-radius: 20px;
  }

  .statgrid {
    gap: 8px;
  }

  .stat {
    padding: 10px 12px;
  }

  .contact {
    gap: 8px;
  }

  .social {
    padding: 8px 10px;
    font-size: 14px;
  }

  .skills {
    gap: 6px;
  }

  .chip {
    padding: 6px 10px;
    font-size: 13px;
  }

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

  .proj {
    padding: 14px;
  }

  footer {
    padding-bottom: 20px;
    margin-top: 30px;
  }
}

@media (max-width: 400px) {
  .wrap {
    padding: 10px;
  }

  .header {
    margin: -10px -10px 14px -10px;
    padding: 10px;
  }

  .logo {
    width: 46px;
    height: 46px;
    border-radius: 10px;
  }

  .brand {
    gap: 12px;
  }

  .btn {
    padding: 7px 10px;
    font-size: 13px;
  }

  .headline {
    font-size: 20px;
  }

  .card {
    padding: 14px;
  }

  .sub {
    font-size: 14px;
  }

  .avatar {
    width: 100px;
    height: 100px;
  }
}