:root {
  color-scheme: light dark;
  --font-body: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: "Georgia", "Times New Roman", serif;
  --color-bg: #0a0e1a;
  --color-bg-alt: rgba(15, 23, 42, 0.85);
  --color-card: rgba(30, 41, 59, 0.65);
  --color-card-hover: rgba(30, 41, 59, 0.85);
  --color-card-border: rgba(148, 163, 184, 0.2);
  --color-text: #f1f5f9;
  --color-subtle: #94a3b8;
  --color-accent: #3b82f6;
  --color-accent-hover: #60a5fa;
  --color-accent-soft: rgba(59, 130, 246, 0.12);
  --color-gradient-from: #3b82f6;
  --color-gradient-to: #8b5cf6;
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 32px 80px rgba(0, 0, 0, 0.5);
  --max-width: min(1080px, 94vw);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background:
    radial-gradient(circle at 20% 20%, rgba(59, 130, 246, 0.15), transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.12), transparent 50%),
    var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover,
a:focus {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

.with-icon {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.with-icon .icon {
  width: 1.1em;
  height: 1.1em;
  fill: currentColor;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.with-icon:hover .icon {
  transform: scale(1.1);
}

header {
  padding: 48px 0 24px;
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 26, 0.7);
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: var(--max-width);
  margin: 0 auto;
}

nav a.brand {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--color-gradient-from), var(--color-gradient-to));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

nav ul {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

nav li a {
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  padding: 0.5rem 0;
}

nav li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gradient-from), var(--color-gradient-to));
  transition: width 0.3s ease;
}

nav li a:hover::after {
  width: 100%;
}

nav li a:hover {
  text-decoration: none;
}

main {
  width: var(--max-width);
  margin: 0 auto;
  padding-bottom: 96px;
  position: relative;
}

main > section {
  margin-bottom: 80px;
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
  padding: 48px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.05));
  backdrop-filter: blur(20px);
  border-radius: 24px;
  border: 1px solid rgba(148, 163, 184, 0.15);
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
  animation: rotate 20s linear infinite;
  z-index: 0;
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 15% 20%, rgba(139, 92, 246, 0.15), transparent 60%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.eyebrow {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.5rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  margin: 0 0 0.75rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-text), var(--color-subtle));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.hero p.lead {
  font-size: 1.2rem;
  color: var(--color-subtle);
  margin-bottom: 1.8rem;
  line-height: 1.6;
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 2rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--color-gradient-from), var(--color-gradient-to));
  color: #ffffff;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s ease;
  box-shadow: 0 20px 40px rgba(59, 130, 246, 0.3);
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.cta:hover::before {
  left: 100%;
}

.cta:hover,
.cta:focus {
  transform: translateY(-3px);
  text-decoration: none;
  box-shadow: 0 25px 60px rgba(59, 130, 246, 0.4);
}

.hero aside {
  position: relative;
  z-index: 1;
}

.hero aside ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.8rem;
}

.hero aside li {
  padding: 1.1rem 1.4rem;
  background: var(--color-card);
  border: 1px solid var(--color-card-border);
  border-radius: 18px;
  font-size: 0.98rem;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.hero aside li:hover {
  background: var(--color-card-hover);
  border-color: rgba(59, 130, 246, 0.4);
  transform: translateX(8px);
}

.section-heading {
  margin: 72px 0 32px;
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.3;
}

.section-heading span {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 0.5rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.8rem;
}

.project-card {
  padding: 2rem;
  background: var(--color-card);
  border: 1px solid var(--color-card-border);
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.05), transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.project-card:hover::before {
  opacity: 1;
}

.project-card:hover,
.project-card:focus-within {
  transform: translateY(-8px);
  border-color: rgba(59, 130, 246, 0.6);
  box-shadow: 0 20px 60px rgba(59, 130, 246, 0.2);
  background: var(--color-card-hover);
}

.project-card > * {
  position: relative;
  z-index: 1;
}

.project-card h3 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--color-text), var(--color-subtle));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.project-card p {
  line-height: 1.65;
  color: var(--color-subtle);
}

.project-card a {
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s ease;
}

.project-card a:hover {
  transform: translateX(4px);
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.badge {
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: 1px solid rgba(59, 130, 246, 0.2);
  transition: all 0.2s ease;
}

.badge:hover {
  background: rgba(59, 130, 246, 0.2);
  border-color: rgba(59, 130, 246, 0.4);
  transform: scale(1.05);
}

.timeline {
  position: relative;
  padding-left: 1.5rem;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0.5rem;
  left: 0.6rem;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--color-gradient-from), var(--color-gradient-to));
  border-radius: 999px;
}

.timeline-item {
  position: relative;
  padding: 0 0 2rem 1.8rem;
  transition: all 0.3s ease;
}

.timeline-item:hover {
  transform: translateX(8px);
}

.timeline-item::before {
  content: "";
  position: absolute;
  top: 0.55rem;
  left: -1.15rem;
  width: 14px;
  height: 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--color-gradient-from), var(--color-gradient-to));
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.25);
  transition: all 0.3s ease;
}

.timeline-item:hover::before {
  transform: scale(1.2);
  box-shadow: 0 0 0 6px rgba(59, 130, 246, 0.3);
}

.timeline-item h4 {
  margin: 0 0 0.5rem;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-text);
}

.timeline-item span {
  font-size: 0.9rem;
  color: var(--color-accent);
  font-weight: 600;
  display: block;
  margin-bottom: 0.75rem;
}

.timeline-item p {
  color: var(--color-subtle);
  line-height: 1.65;
}

.contact-card {
  margin-top: 64px;
  padding: 3rem;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(139, 92, 246, 0.1));
  backdrop-filter: blur(20px);
  border-radius: 24px;
  border: 1px solid rgba(59, 130, 246, 0.3);
  display: grid;
  gap: 1.6rem;
  justify-items: start;
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.2), transparent 60%);
  z-index: 0;
}

.contact-card > * {
  position: relative;
  z-index: 1;
}

.contact-card p {
  margin: 0;
  color: var(--color-subtle);
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.contact-links a {
  display: inline-flex;
  gap: 0.6rem;
  align-items: center;
  padding: 0.75rem 1.5rem;
  border-radius: 12px;
  border: 1px solid rgba(59, 130, 246, 0.4);
  background: rgba(59, 130, 246, 0.15);
  color: var(--color-accent);
  font-weight: 600;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.contact-links a:hover,
.contact-links a:focus {
  transform: translateY(-3px);
  background: rgba(59, 130, 246, 0.25);
  border-color: rgba(59, 130, 246, 0.6);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.25);
  text-decoration: none;
  color: var(--color-accent-hover);
}

footer {
  margin: 84px 0 48px;
  text-align: center;
  color: var(--color-subtle);
  font-size: 0.9rem;
  padding: 2rem 0;
  border-top: 1px solid rgba(148, 163, 184, 0.1);
}

footer a {
  color: var(--color-accent);
  transition: color 0.2s ease;
}

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

section {
  scroll-margin-top: 120px;
  animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

#about {
  background: rgba(30, 41, 59, 0.3);
  padding: 2.5rem;
  border-radius: 20px;
  border: 1px solid rgba(148, 163, 184, 0.1);
  backdrop-filter: blur(10px);
}

#about p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--color-subtle);
  margin-bottom: 1.5rem;
}

#about p:last-of-type {
  margin-bottom: 0;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (max-width: 720px) {
  header {
    padding: 24px 0 12px;
  }

  nav {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  nav li a::after {
    display: none;
  }

  .hero {
    padding: 28px;
    gap: 2rem;
  }

  .section-heading {
    margin: 48px 0 24px;
    font-size: 1.6rem;
  }

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

  .contact-card {
    padding: 2rem;
  }

  .timeline {
    padding-left: 1rem;
  }

  .timeline-item {
    padding-left: 1.5rem;
  }
}