:root {
  --bg: #0d1117;
  --bg-elevated: #161b22;
  --bg-card: #1c2330;
  --border: #30363d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --accent-soft: rgba(88, 166, 255, 0.12);
  --accent-hover: #79b8ff;
  --radius: 12px;
  --radius-lg: 18px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --header-h: 64px;
  --max-w: 920px;
  --font: "Inter", system-ui, -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  color: var(--accent-hover);
}

.container {
  width: min(100% - 2rem, var(--max-w));
  margin-inline: auto;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.site-logo {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  letter-spacing: 0.02em;
}

.site-logo span {
  color: var(--accent);
}

.site-nav {
  display: flex;
  gap: 1.5rem;
}

.site-nav a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

.site-nav a:hover {
  color: var(--text);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--text);
}

.nav-toggle__icon {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  position: relative;
}

.nav-toggle__icon::before,
.nav-toggle__icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s ease;
}

.nav-toggle__icon::before { top: -7px; }
.nav-toggle__icon::after { top: 7px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__icon {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon::before {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon::after {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero */

.hero {
  padding: 4.5rem 0 3.5rem;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2.5rem;
  align-items: center;
}

.hero__eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero__title {
  margin: 0 0 0.5rem;
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.hero__role {
  margin: 0 0 1rem;
  font-size: 1.2rem;
  color: var(--text-muted);
  font-weight: 500;
}

.hero__tagline {
  margin: 0 0 1.75rem;
  max-width: 36ch;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: #0d1117;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 999px;
  transition: background 0.15s ease, transform 0.15s ease;
}

.hero__cta:hover {
  background: var(--accent-hover);
  color: #0d1117;
  transform: translateY(-1px);
}

.hero__avatar {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--bg-card), var(--bg-elevated));
  border: 2px solid var(--border);
  flex-shrink: 0;
  overflow: hidden;
}

.hero__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

/* Sections */

.section {
  padding: 3.5rem 0;
  border-top: 1px solid var(--border);
}

.section__title {
  margin: 0 0 2rem;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.section__lead {
  margin: -1rem 0 2rem;
  color: var(--text-muted);
  max-width: 52ch;
}

/* About */

.about__text {
  margin: 0;
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 72ch;
}

.about__text + .about__text {
  margin-top: 1rem;
}

.skills__group--wide {
  grid-column: 1 / -1;
}

/* Experience timeline */

.timeline {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.timeline__item {
  position: relative;
  padding-left: 1.25rem;
  border-left: 2px solid var(--border);
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 0.45rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.timeline__period {
  margin: 0 0 0.25rem;
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
}

.timeline__role {
  margin: 0 0 0.15rem;
  font-size: 1.05rem;
  font-weight: 600;
}

.timeline__company {
  margin: 0 0 0.5rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.timeline__desc {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Project card */

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow);
  transition: border-color 0.2s ease;
}

.project-card:hover {
  border-color: rgba(88, 166, 255, 0.35);
}

.project-card__logo {
  margin-bottom: 1.25rem;
}

.project-card__logo img {
  height: 32px;
  width: auto;
}

.project-card__name {
  margin: 0 0 0.75rem;
  font-size: 1.2rem;
  font-weight: 700;
}

.project-card__desc {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
  font-size: 0.98rem;
  max-width: 58ch;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  list-style: none;
  padding: 0;
}

.project-card__tags li {
  padding: 0.3rem 0.75rem;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 999px;
}

.project-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 600;
  font-size: 0.95rem;
}

.project-card__link::after {
  content: "→";
  transition: transform 0.15s ease;
}

.project-card__link:hover::after {
  transform: translateX(3px);
}

/* Skills */

.skills {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}

.skills__group h3 {
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.skills__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.skills__list li {
  padding: 0.3rem 0.7rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Education */

.edu__item {
  margin: 0;
}

.edu__degree {
  margin: 0 0 0.25rem;
  font-weight: 600;
}

.edu__school {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Contact */

.contact__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.contact__item {
  padding: 1.25rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.contact__label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.contact__value {
  font-weight: 500;
  word-break: break-word;
}

/* Footer */

.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Mobile */

@media (max-width: 720px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    padding: 0.5rem 0;
    transform: translateY(-110%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }

  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav a {
    display: block;
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border);
  }

  .hero__grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__tagline {
    margin-inline: auto;
  }

  .hero__avatar {
    margin-inline: auto;
    order: -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}