:root {
  --bg: #05070b;
  --bg-alt: #0a1020;
  --surface: #0f1523;
  --surface-strong: #121a2b;
  --line: rgba(118, 146, 214, 0.18);
  --line-strong: rgba(118, 146, 214, 0.28);
  --text: #edf4ff;
  --muted: #9caac2;
  --accent: #5b89ff;
  --accent-strong: #7aa2ff;
  --glow: rgba(91, 137, 255, 0.16);
  --shadow: 0 10px 28px rgba(0, 0, 0, 0.24);
  --radius: 14px;
  --radius-lg: 18px;
  --container: 1180px;
  --header-height: 84px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(91, 137, 255, 0.12), transparent 28%),
    radial-gradient(circle at 85% 12%, rgba(91, 137, 255, 0.08), transparent 26%),
    linear-gradient(180deg, #05070b 0%, #070d17 100%);
  font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 92%);
  opacity: 0.35;
}

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

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

button {
  font: inherit;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-shell {
  width: min(100% - 32px, var(--container));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  padding: 18px 0 10px;
  transition: transform 0.25s ease, padding 0.25s ease;
}

.site-header.scrolled {
  padding: 10px 0 8px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(9, 13, 22, 0.96);
  box-shadow: var(--shadow);
  transition: border-color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
}

.site-header.scrolled .nav {
  border-color: var(--line-strong);
  background: rgba(8, 12, 20, 0.98);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.26);
}

.brand {
  display: inline-flex;
  align-items: center;
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 1.02rem;
}

.nav-panel {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-panel a {
  color: var(--muted);
  font-size: 0.95rem;
  transition: color 0.2s ease, transform 0.2s ease;
}

.nav-panel a:hover,
.nav-panel a:focus-visible {
  color: var(--text);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  min-width: 92px;
  height: 44px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--text);
  background: #0d1423;
  cursor: pointer;
  letter-spacing: 0.02em;
}

.section {
  padding: 88px 0 0;
}

.hero {
  min-height: calc(100vh - var(--header-height));
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 36px;
  padding-top: 64px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2 {
  margin: 0;
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.hero h1 {
  font-size: clamp(3.2rem, 8vw, 6.3rem);
}

.hero-subtitle {
  margin: 20px 0 8px;
  color: var(--text);
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
  font-weight: 600;
}

.hero-description {
  margin: 0;
  max-width: 42rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    border-color 0.2s ease,
    background 0.2s ease;
}

.btn-primary {
  color: #071120;
  background: linear-gradient(180deg, var(--accent-strong), var(--accent));
  box-shadow: 0 8px 18px rgba(91, 137, 255, 0.18);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(91, 137, 255, 0.22);
}

.btn-secondary {
  color: var(--text);
  border-color: var(--line);
  background: #0d1423;
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(106, 155, 255, 0.38);
  background: #10192b;
}

.hero-panel {
  position: relative;
  display: grid;
  gap: 14px;
  align-content: start;
  padding-top: 8px;
}

.glass-card {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.flat-card,
.glass-card {
  border-radius: var(--radius);
}

.flat-card {
  position: relative;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.flat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(180deg, var(--accent-strong), var(--accent));
}

.highlight-card {
  padding: 24px 20px 24px 24px;
}

.flat-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.card-kicker,
.project-tag,
.contact-label {
  margin: 0;
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.card-title {
  margin: 8px 0 0;
  color: var(--text);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.card-text {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.section-heading {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 26px;
}

.section-heading h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
}

.about-grid,
.projects-grid {
  display: grid;
  gap: 18px;
}

.about-grid {
  grid-template-columns: 1.2fr 0.8fr;
}

.projects-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.section-text,
.detail-list,
.project-card p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
}

.glass-card {
  padding: 24px;
}

.about-grid > .glass-card,
.project-card,
.contact-card {
  padding: 22px;
}

.detail-list {
  list-style: none;
  display: grid;
  gap: 12px;
  padding: 0;
}

.detail-list li {
  position: relative;
  padding-left: 20px;
}

.detail-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.82em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(91, 137, 255, 0.14);
  transform: translateY(-50%);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.skill-card {
  min-height: 92px;
  display: grid;
  place-items: center;
  color: var(--text);
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.skill-card:hover {
  transform: translateY(-3px);
  border-color: rgba(116, 159, 255, 0.3);
  background: var(--surface-strong);
}

.project-card h3 {
  margin: 10px 0 12px;
  font-size: 1.2rem;
}

.project-tag {
  display: inline-flex;
  width: fit-content;
  padding: 0;
  border: 0;
  background: transparent;
}

.contact-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.contact-email {
  color: var(--text);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  position: relative;
}

.contact-email::after,
.btn-animate::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -6px;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  transform: translateX(-50%) scaleX(0);
  transform-origin: center;
  transition: transform 0.24s ease;
}

.contact-email:hover::after,
.contact-email:focus-visible::after,
.btn-animate:hover::after,
.btn-animate:focus-visible::after {
  transform: translateX(-50%) scaleX(1);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 34px 0 40px;
  color: var(--muted);
  font-size: 0.94rem;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  transition: color 0.2s ease;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--text);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.65s ease,
    transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.btn-animate {
  position: relative;
}

.btn.is-pressed {
  transform: scale(0.97);
}

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 48px;
    min-height: auto;
  }

  .about-grid,
  .projects-grid,
  .skills-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact-card {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 720px) {
  .site-shell {
    width: min(100% - 20px, var(--container));
  }

  .nav {
    border-radius: 16px;
    padding: 12px 14px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-panel {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    left: 0;
    display: grid;
    gap: 0;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: rgba(8, 12, 20, 0.98);
    box-shadow: var(--shadow);
    transform-origin: top right;
    transform: scale(0.96);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }

  .nav-panel.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: scale(1);
  }

  .nav-panel a {
    padding: 14px 14px;
    border-radius: 14px;
    background: transparent;
  }

  .nav-panel a:hover,
  .nav-panel a:focus-visible {
    background: rgba(255, 255, 255, 0.04);
  }

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

  .hero {
    padding-top: 28px;
  }

  .flat-card-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}