:root {
  --bg: #0d0e10;
  --fg: #f1f1f3;
  --muted: #8a8d94;
  --border: #23262b;
  --accent: #f1f1f3;
  --card-bg: #16181c;
  --max-width: 880px;
  --radius: 6px;
}

html { background: var(--bg); }
::selection { background: #2d3138; color: var(--fg); }

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--fg); text-decoration: none; border-bottom: 1px solid transparent; transition: border-color .15s; }
a:hover { border-bottom-color: var(--fg); }

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

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

/* Header / Nav */
header {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav-inner {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  max-width: 100%;
  padding: 0 32px;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 22px;
  align-items: center;
  flex-wrap: wrap;
}

nav a {
  font-size: 15px;
  color: var(--muted);
}

nav a.active, nav a:hover {
  color: var(--fg);
}

.lang-switch {
  display: flex;
  gap: 4px;
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.lang-switch button {
  background: transparent;
  border: none;
  padding: 5px 10px;
  cursor: pointer;
  color: var(--muted);
  font-family: inherit;
  font-size: 13px;
}

.lang-switch button.active {
  background: var(--fg);
  color: var(--bg);
}

/* Main */
main { padding: 56px 0 80px; }

.page-title {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.page-subtitle {
  color: var(--muted);
  margin-bottom: 40px;
  font-size: 16px;
}

/* Hero (home) */
.hero h1 {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 10px;
}

.hero .role {
  color: var(--muted);
  font-size: 18px;
  margin-bottom: 24px;
}

.hero p.bio {
  font-size: 17px;
  max-width: 680px;
  margin-bottom: 28px;
}

.hero .cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: var(--radius);
  font-size: 15px;
  border: 1px solid var(--fg);
  background: var(--fg);
  color: var(--bg);
  transition: opacity .15s;
}

.btn:hover { opacity: 0.85; border-bottom-color: var(--fg); }

.btn.secondary {
  background: transparent;
  color: var(--fg);
}

/* Sections */
section.block { margin-top: 48px; }

section.block h2 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 18px;
  letter-spacing: -0.01em;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

/* Experience / Education timeline */
.timeline-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.timeline-item:last-child { border-bottom: none; }

.timeline-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.timeline-role {
  font-weight: 600;
  font-size: 16px;
}

.company-link {
  color: var(--muted);
  border-bottom: 1px solid var(--muted);
  transition: color .15s, border-color .15s;
}
.company-link::after {
  content: " ↗";
  font-size: 11px;
  opacity: 0.7;
}
.company-link:hover {
  color: var(--fg);
  border-bottom-color: var(--fg);
}
.company-link:hover::after {
  opacity: 1;
}

.timeline-company {
  color: var(--muted);
  font-size: 15px;
}

.timeline-date {
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
}

.timeline-body ul {
  margin: 8px 0 0 20px;
  font-size: 15px;
  color: var(--fg);
}

.timeline-body li { margin-bottom: 4px; }

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.skill-group {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
}

.skill-group h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.skill-list span {
  font-size: 13px;
  padding: 3px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
}

/* Projects */
.project {
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}

.project:last-child { border-bottom: none; }

.project-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.project h3 {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.project-links {
  display: flex;
  gap: 12px;
  font-size: 14px;
}

.project-links a {
  color: var(--muted);
  border-bottom: 1px solid var(--border);
}

.project-links a:hover { color: var(--fg); border-bottom-color: var(--fg); }

.github-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border: 1px solid var(--border) !important;
  border-bottom: 1px solid var(--border) !important;
  border-radius: 6px;
  font-size: 13px;
  color: var(--fg) !important;
  background: var(--card-bg);
  transition: border-color .15s, background .15s;
}

.github-btn:hover {
  border-color: var(--fg) !important;
  background: #1e2025;
}

.screenshot-link {
  display: block;
  position: relative;
  margin-top: 8px;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
  cursor: zoom-in;
}

.screenshot-img {
  width: 100%;
  display: block;
  border-radius: 6px;
  transition: opacity .2s;
}

.screenshot-link:hover .screenshot-img {
  opacity: 0.75;
}

.screenshot-zoom {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 28px;
  height: 28px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  font-size: 16px;
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity .2s;
  pointer-events: none;
}

.screenshot-link:hover .screenshot-zoom {
  opacity: 1;
}

.project p.desc {
  font-size: 15px;
  margin-bottom: 12px;
}

.project ul.features {
  margin: 0 0 14px 20px;
  font-size: 14px;
  color: var(--fg);
}

.project ul.features li { margin-bottom: 3px; }

.project .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.project .tags span {
  font-size: 12px;
  padding: 3px 9px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
}

/* Project screenshots */
.screenshots {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.mobile-shot {
  max-width: 200px;
}

.mobile-shot .screenshot-img {
  width: 100%;
  height: auto;
}

.screenshot-slot {
  aspect-ratio: 9/16;
  background: var(--card-bg);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
  padding: 8px;
  overflow: hidden;
}

.screenshot-slot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}

.screenshot-slot.wide {
  aspect-ratio: 16/9;
}

/* Contact page */
.contact-list {
  list-style: none;
  display: grid;
  gap: 14px;
  font-size: 16px;
}

.contact-list li {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
}

.contact-list .label {
  color: var(--muted);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  min-width: 80px;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

/* Hidden lang */
[data-lang]:not(.active-lang) { display: none; }

/* Responsive */
@media (max-width: 600px) {
  .hero h1 { font-size: 32px; }
  .page-title { font-size: 24px; }
  nav ul { gap: 14px; }
  nav a { font-size: 14px; }
  main { padding: 36px 0 60px; }
}