/* ===== Design system ===== */
:root {
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --bg-elevated: #ffffff;
  --border: rgba(15, 23, 42, 0.06);
  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-subtle: rgba(99, 102, 241, 0.08);
  --radius-sm: 6px;
  --radius: 14px;
  --radius-lg: 24px;
  --radius-pill: 9999px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.08);
  --font: 'JetBrains Mono', ui-monospace, monospace;

  /* Glass style */
  --glass-bg: rgba(255, 255, 255, 0.4);
  --glass-bg-strong: rgba(255, 255, 255, 0.6);
  --glass-border: 1px solid rgba(255, 255, 255, 0.6);
  --glass-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  --glass-shadow-inset: 0 1px 0 rgba(255, 255, 255, 0.8) inset;
  --glass-blur: blur(20px) saturate(180%);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover { color: var(--accent-hover); }

/* ===== Header ===== */
.header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 1.5rem;
  pointer-events: none;
}

.header > * {
  pointer-events: auto;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 0.6rem 1.75rem;
  max-width: 900px;
  width: 100%;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-pill);
  box-shadow: var(--glass-shadow), var(--glass-shadow-inset);
}

.nav__logo {
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: -0.02em;
  color: var(--text);
}
.nav__logo:hover { color: var(--accent); }

.nav__links {
  display: flex;
  gap: 2.25rem;
}
.nav__links a {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.nav__links a:hover { color: var(--accent); }

.nav__cta {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  background: var(--text);
  color: white;
  border-radius: var(--radius-pill);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: background 0.15s, transform 0.15s;
}
.nav__cta:hover {
  background: var(--accent);
  color: white;
  transform: translateY(-1px);
}

/* ===== Main ===== */
main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
  padding-top: 5.5rem;
}

/* ===== Hero ===== */
.hero {
  padding: 2rem 0 6rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero__avatar-wrap {
  margin-bottom: 1.5rem;
}

.hero__avatar {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: var(--glass-shadow), var(--glass-shadow-inset);
  border: 3px solid rgba(255, 255, 255, 0.8);
}

.hero__title {
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  margin: 0 0 0.75rem;
  line-height: 1.15;
}

.hero__intro {
  max-width: 480px;
  margin: 0 auto 0.9rem;
  font-size: 1rem;
  color: var(--text-secondary);
}
.hero__intro:last-child { margin-bottom: 0; }
.hero__intro strong {
  color: var(--accent);
  font-weight: 600;
}
.hero__highlight {
  font-weight: 700;
  color: var(--accent);
  background: var(--glass-bg);
  padding: 0.15em 0.5em;
  border-radius: var(--radius-pill);
  border: var(--glass-border);
  box-shadow: var(--glass-shadow-inset);
}

.hero__links {
  display: flex;
  gap: 0.75rem;
  margin-top: 2rem;
}

.link-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  color: var(--text-muted);
  box-shadow: var(--glass-shadow), var(--glass-shadow-inset);
  transition: all 0.2s ease;
}
.link-btn:hover {
  color: var(--accent);
  box-shadow: var(--shadow-hover), var(--glass-shadow-inset);
  transform: translateY(-2px);
}
.link-btn svg { width: 20px; height: 20px; }

/* ===== Sections ===== */
.section {
  padding: 4.5rem 0;
}

.section__title {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin: 0 0 2rem;
}

.container { max-width: 100%; }

/* ===== Skills ===== */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.skill-card {
  padding: 1.5rem 1.25rem;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow), var(--glass-shadow-inset);
  transition: all 0.2s ease;
}

.skill-card:hover {
  box-shadow: var(--shadow-hover), var(--glass-shadow-inset);
  transform: translateY(-2px);
}

.skill-card__icon {
  font-size: 1.5rem;
  display: block;
  margin-bottom: 0.75rem;
}

.skill-card h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin: 0 0 0.4rem;
  letter-spacing: -0.01em;
}

.skill-card p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ===== Experience & Projects ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.exp-card,
.project-card {
  padding: 1.75rem;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow), var(--glass-shadow-inset);
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
}

.exp-card:hover,
.project-card:hover {
  box-shadow: var(--shadow-hover), var(--glass-shadow-inset);
  transform: translateY(-2px);
}

.exp-card__company,
.project-card__title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 0.25rem;
}

.exp-card__company a,
.project-card__title a {
  color: inherit;
}
.exp-card__company a:hover,
.project-card__title a:hover {
  color: var(--accent);
}

.exp-card__role {
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 0.6rem;
}

.exp-card__summary,
.project-card__desc {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.55;
  flex-grow: 1;
}

.projects-placeholder {
  grid-column: 1 / -1;
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 2rem;
  text-align: center;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow), var(--glass-shadow-inset);
}

/* ===== Education ===== */
.edu-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.edu-item {
  padding: 1.25rem 1.5rem;
  margin-bottom: 0.75rem;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow), var(--glass-shadow-inset);
  display: grid;
  gap: 0.2rem;
}

.edu-item:last-child {
  margin-bottom: 0;
}

.edu-item__school {
  font-size: 1rem;
  font-weight: 600;
  margin: 0;
}

.edu-item__degree {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== Contact ===== */
.contact__text {
  margin: 0 0 1.25rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.contact__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.contact__link {
  font-size: 0.85rem;
  padding: 0.6rem 1.1rem;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  color: var(--text);
  border-radius: var(--radius-pill);
  box-shadow: var(--glass-shadow), var(--glass-shadow-inset);
  transition: all 0.2s ease;
}

.contact__link:hover {
  color: var(--accent);
  box-shadow: var(--shadow-hover), var(--glass-shadow-inset);
}

.contact__link--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.contact__link--primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: white;
}

/* ===== Footer ===== */
.footer {
  margin-top: 6rem;
  padding: 3rem 1.5rem;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-top: var(--glass-border);
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.04);
}

.footer__content {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.footer__links {
  display: flex;
  gap: 1.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

.footer__links a {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.footer__links a:hover { color: var(--accent); }

.footer__copyright {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer__back {
  font-family: var(--font);
  font-size: 0.8rem;
  padding: 0.5rem 1.25rem;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-pill);
  color: var(--text-muted);
  box-shadow: var(--glass-shadow), var(--glass-shadow-inset);
  cursor: pointer;
  transition: all 0.15s ease;
}

.footer__back:hover {
  border-color: rgba(99, 102, 241, 0.4);
  color: var(--accent);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero { padding: 3.5rem 0 4.5rem; }
  
  .skills__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .nav__links { display: none; }
  
  .hero__title { font-size: 2rem; }
  
  .section { padding: 3rem 0; }
}