:root {
  --bg: #0b0c10;
  --bg-elevated: #11131a;
  --bg-soft: #151821;
  --border-subtle: rgba(255, 255, 255, 0.06);
  --text: #f5f5f7;
  --muted: #a0a4b8;
  --accent: #4f8cff;
  --accent-soft: rgba(79, 140, 255, 0.12);
  --accent-strong: #7cf4ff;
  --danger: #ff6b6b;
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-full: 999px;
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.55);
  --shadow-subtle: 0 1px 0 rgba(255, 255, 255, 0.04);
  --container-width: 1120px;
  --gap-section: 80px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Inter", "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #1a2335 0, #05060a 55%, #000 100%);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

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

img {
  display: block;
  max-width: 100%;
}

.shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  padding: 12px 0;
  background: linear-gradient(
    to bottom,
    rgba(9, 12, 20, 0.98),
    rgba(9, 12, 20, 0.96),
    rgba(9, 12, 20, 0.9),
    transparent
  );
  backdrop-filter: blur(18px);
}

.topbar-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.9rem;
  color: var(--muted);
}

.topbar-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--accent-strong), var(--accent));
  box-shadow: 0 0 12px rgba(124, 244, 255, 0.6);
}

.topbar-name {
  font-weight: 500;
  color: var(--text);
}

.topbar-role {
  font-size: 0.7rem;
  color: var(--muted);
}

.topbar-nav {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.82rem;
}

.topbar-nav a {
  padding: 6px 10px;
  border-radius: 999px;
  color: var(--muted);
  transition: background 0.12s ease, color 0.12s ease;
}

.topbar-nav a:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

.hero {
  padding: 72px 0 40px;
}

.hero-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.6fr);
  gap: 40px;
  align-items: center;
}

.hero-main {
  max-width: 560px;
}

.hero-kicker {
  margin: 0 0 8px;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero-title {
  margin: 0 0 8px;
  font-size: 2.4rem;
  letter-spacing: 0.04em;
}

.hero-tagline {
  margin: 0 0 12px;
  font-size: 1rem;
  color: var(--accent-strong);
}

.hero-highlights {
  list-style: none;
  margin: 10px 0 12px;
  padding: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.hero-highlights li::before {
  content: "•";
  margin-right: 6px;
  color: var(--accent-strong);
}

.hero-meta {
  margin: 10px 0 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--muted);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.badge-open {
  background: rgba(69, 213, 154, 0.14);
  color: #7dfcc4;
  border: 1px solid rgba(125, 252, 196, 0.3);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease,
    transform 0.08s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #4f8cff, #7cf4ff);
  color: #05060a;
  border-color: rgba(5, 6, 10, 0.8);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.5);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.16);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
}

.hero-aside {
  display: flex;
  justify-content: flex-end;
}

.hero-avatar-card {
  width: 100%;
  max-width: 360px;
  border-radius: 22px;
  padding: 16px;
  background: radial-gradient(circle at top left, #181e2c, #070910);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-soft);
}

.hero-avatar-ring {
  margin-bottom: 14px;
  border-radius: 28px;
  padding: 3px;
  background: radial-gradient(circle at 0 0, var(--accent-strong), #6d4fff);
}

.hero-avatar {
  width: 100%;
  height: 100%;
  border-radius: 24px;
  object-fit: cover;
  border: 2px solid rgba(0, 0, 0, 0.6);
}

.hero-stack {
  margin-bottom: 12px;
}

.stack-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.stack-tags {
  margin-top: 6px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.hero-terminal {
  margin-top: 10px;
  border-radius: 16px;
  background: #05070d;
  border: 1px solid rgba(255, 255, 255, 0.06);
  overflow: hidden;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  background: linear-gradient(to right, #111525, #070912);
  font-size: 0.7rem;
  color: var(--muted);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
}

.dot.red {
  background: #ff5f57;
}

.dot.amber {
  background: #febc2e;
}

.dot.green {
  background: #28c840;
}

.terminal-title {
  margin-left: auto;
}

.terminal-body {
  padding: 10px 12px 12px;
  font-size: 0.78rem;
  color: var(--muted);
}

.terminal-body code {
  white-space: pre-wrap;
}

.section {
  padding: 40px 0;
}

.section:nth-of-type(odd) {
  background: radial-gradient(circle at top left, rgba(24, 30, 44, 0.6), transparent 55%);
}

.section-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section-header {
  margin-bottom: 16px;
}

.section-title {
  margin: 0;
  font-size: 1rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.section-subheading {
  margin: 0 0 8px;
  font-size: 0.95rem;
  color: var(--text);
}

.section-body.two-column {
  display: grid;
  grid-template-columns: minmax(0, 2.7fr) minmax(0, 2.3fr);
  gap: 24px;
  align-items: flex-start;
}

.section-side {
  font-size: 0.9rem;
}

.body-text {
  margin: 10px;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text);
}

.bullet-list {
  margin: 8px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.bullet-list li + li {
  margin-top: 4px;
}

.skills-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.card {
  padding: 16px 16px 14px;
  border-radius: var(--radius-md);
  background: radial-gradient(circle at top left, #191e2c, #0b0d15);
  border: 1px solid var(--border-subtle);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: 10px;
}

.card-title {
  margin: 0;
  font-size: 0.98rem;
  color: var(--text);
}

.card-meta {
  margin: 2px 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.text-right {
  text-align: right;
}

.card-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.link-primary {
  font-size: 0.85rem;
  color: var(--accent-strong);
}

.link-primary:hover {
  text-decoration: underline;
}

.chip-list {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-size: 0.78rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
}

.chip-soft {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.tag-row {
  margin: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.timeline {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.timeline-item {
  position: relative;
  padding-left: 18px;
}

.timeline-dot {
  position: absolute;
  left: 0;
  top: 20px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-strong);
  box-shadow: 0 0 0 6px rgba(124, 244, 255, 0.12);
}

.timeline-item::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 30px;
  bottom: -12px;
  width: 1px;
  background: radial-gradient(circle at top, var(--accent-soft), transparent 65%);
}

.timeline-item:last-child::after {
  display: none;
}

.timeline-body {
  margin-left: 12px;
}

.products {
  margin-top: 8px;
  font-size: 0.86rem;
  color: var(--muted);
}

.products summary {
  cursor: pointer;
  list-style: none;
}

.products summary::-webkit-details-marker {
  display: none;
}

.products summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 6px;
  font-size: 0.7rem;
  transform: translateY(-1px);
}

.products[open] summary::before {
  content: "▾";
}

.education-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.education-item {
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
}

.edu-main {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.9rem;
}

.edu-institution {
  font-weight: 500;
}

.edu-period {
  color: var(--muted);
}

.edu-degree {
  margin-top: 4px;
  font-size: 0.86rem;
  color: var(--muted);
}

.contact-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.9rem;
}

.contact-list li {
  display: flex;
  gap: 14px;
}

.label {
  min-width: 72px;
  color: var(--muted);
}

.site-footer {
  margin-top: auto;
  padding: 18px 0 20px;
  border-top: 1px solid var(--border-subtle);
}

.site-footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--muted);
}

.site-footer-meta {
  opacity: 0.9;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.contributions-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.project-card {
  padding: 0 0 14px;
  border-radius: var(--radius-md);
  background: radial-gradient(circle at top left, #191b26, #070910);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin: 8px;
}

.project-title {
  margin: 0;
  font-size: 0.98rem;
}

.project-meta {
  margin: 2px 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.project-media {
  position: relative;
  width: 100%;
  padding-top: 75%; /* 4:3 */
  overflow: hidden;
  background: var(--bg-soft);
}

.project-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  transition: transform 0.6s ease;
}

.project-card:hover .project-image {
  transform: scale(1.05);
}

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    padding-inline: 18px;
  }

  .hero-aside {
    justify-content: flex-start;
  }

  .section-inner {
    padding-inline: 18px;
  }

  .section-body.two-column {
    grid-template-columns: minmax(0, 1fr);
  }

  .section-side {
    margin-top: 8px;
  }
}

@media (max-width: 720px) {
  .topbar-inner {
    padding-inline: 18px;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .topbar-nav {
    flex-wrap: wrap;
    gap: 10px;
  }

  .timeline-item {
    padding-left: 14px;
  }

  .timeline-dot {
    top: 18px;
  }

  .timeline-item::after {
    left: 3px;
  }

  .edu-main {
    flex-direction: column;
    align-items: flex-start;
  }
}