:root {
  --bg-primary: #080707;
  --bg-secondary: #2b2929;
  --bg-tertiary: #121111;
  --accent-primary: #9c541e;
  --accent-secondary: #4b7ba6;
  --accent-soft: rgba(156, 84, 30, 0.25);
  --text-primary: #f3f3f3;
  --text-secondary: #a39e9e;
  --border-color: rgba(163, 158, 158, 0.35);
  --radius-lg: 20px;
  --radius-md: 14px;
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.75);
}

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

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  scroll-behavior: smooth;
  background-image:
    radial-gradient(circle at 20% 20%, rgba(156, 84, 30, 0.18), transparent 45%),
    radial-gradient(circle at 80% 0%, rgba(75, 123, 166, 0.15), transparent 50%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140' viewBox='0 0 120 120'%3E%3Cpolygon points='60 6 108 33 108 87 60 114 12 87 12 33' fill='none' stroke='rgba(255,255,255,0.05)' stroke-width='1'/%3E%3C/svg%3E");
  background-size: cover, cover, 140px;
}

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

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

body.menu-open {
  overflow: hidden;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  backdrop-filter: blur(18px);
  background: rgba(8, 7, 7, 0.7);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
}

.brand {
  display: flex;
  align-items: center;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.brand img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  margin-right: 0.8rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.desktop-nav a {
  font-size: 0.95rem;
  color: var(--text-secondary);
  padding: 0.4rem 0;
  position: relative;
}

.desktop-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  transform: scaleX(0);
  transition: transform 0.3s ease;
  transform-origin: right;
}

.desktop-nav a:hover,
.desktop-nav a:focus,
.desktop-nav a.active {
  color: var(--text-primary);
}

.desktop-nav a:hover::after,
.desktop-nav a:focus::after,
.desktop-nav a.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.hamburger {
  background: none;
  border: none;
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
}

.hamburger span {
  width: 26px;
  height: 2px;
  background: var(--text-primary);
  display: block;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.mobile-menu {
  position: fixed;
  top: 0;
  right: -320px;
  width: 280px;
  height: 100vh;
  background: rgba(18, 17, 17, 0.95);
  backdrop-filter: blur(18px);
  transition: right 0.35s ease;
  z-index: 999;
  padding: 5rem 2rem;
  display: flex;
  flex-direction: column;
}

.mobile-menu nav {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.mobile-menu a {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.mobile-menu a.active {
  color: var(--accent-primary);
}

.mobile-menu.open {
  right: 0;
}

.menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 900;
}

.menu-overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

main {
  padding-top: 110px;
}

.hero,
.section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.hero {
  min-height: 90vh;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 3rem;
  align-items: center;
}

.eyebrow {
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-secondary);
  font-size: 0.8rem;
}

h1 {
  font-size: clamp(2.5rem, 4vw, 3.6rem);
  margin: 1rem 0;
  line-height: 1.2;
}

h2 {
  font-size: 2rem;
  margin-bottom: 0.6rem;
}

section p {
  color: var(--text-secondary);
}

.subline {
  font-size: 1.1rem;
  max-width: 520px;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.btn {
  padding: 0.85rem 1.9rem;
  border-radius: 999px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid transparent;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.btn.primary {
  background: linear-gradient(120deg, var(--accent-primary), var(--accent-secondary));
  color: #0d0c0c;
}

.btn.secondary {
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.btn:focus-visible,
.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.45);
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.portrait-card {
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  background: var(--bg-secondary);
  border: 1px solid transparent;
  background-image: linear-gradient(var(--bg-secondary), var(--bg-secondary)),
    linear-gradient(120deg, rgba(156, 84, 30, 0.7), rgba(75, 123, 166, 0.7));
  background-origin: border-box;
  background-clip: padding-box, border-box;
  box-shadow: var(--shadow-soft);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.portrait-card:hover {
  transform: translateY(-8px) scale(1.01);
  box-shadow: 0 25px 55px rgba(156, 84, 30, 0.35);
}

.portrait-card img {
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.portrait-badges {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.portrait-badges span {
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-left: 2px solid var(--accent-primary);
  padding-left: 0.8rem;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 3rem;
}

.about-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
}

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

.about-card {
  padding: 1.5rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.about-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-primary);
}

.about-pillars {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.pillar {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: 0.9rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.06);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-size: 0.85rem;
}

.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.stack-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  min-height: 220px;
  transition: border-color 0.3s ease, transform 0.3s ease;
  display: flex;
  flex-direction: column;
}

.stack-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-6px);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.stack-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.stack-card li {
  color: var(--text-primary);
}

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

.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(var(--accent-secondary), var(--accent-primary));
}

.timeline-item {
  position: relative;
  padding-left: 2.5rem;
  margin-bottom: 2.5rem;
}

.marker {
  position: absolute;
  left: -0.6rem;
  top: 0.4rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 2px solid var(--accent-primary);
  box-shadow: 0 0 0 6px rgba(156, 84, 30, 0.15);
}

.timeline-content {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.timeline-content:hover {
  transform: translateX(6px);
  border-color: var(--accent-secondary);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-soft);
  border-color: var(--accent-primary);
}

.project-bar {
  height: 4px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
}

.project-body {
  padding: 1.8rem;
}

.project-body ul {
  padding-left: 1.1rem;
  margin-top: 1rem;
  color: var(--text-secondary);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding: 0 1.8rem 1.8rem;
}

.project-tags span {
  font-size: 0.85rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.contact-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.contact-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.contact-card:hover {
  transform: translateX(6px);
  border-color: var(--accent-primary);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.45);
}

.contact-card .icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.contact-card svg {
  width: 28px;
  height: 28px;
  fill: var(--text-primary);
}

.arrow {
  margin-left: auto;
  font-size: 1.5rem;
  color: var(--accent-primary);
}

.site-footer {
  text-align: center;
  padding: 3rem 2rem 4rem;
  color: var(--text-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  background: rgba(0, 0, 0, 0.4);
}

.back-to-top {
  position: fixed;
  right: 2rem;
  bottom: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--accent-primary);
  background: var(--bg-secondary);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease, background 0.3s ease;
  z-index: 950;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.back-to-top:hover,
.back-to-top:focus-visible {
  background: var(--accent-primary);
  color: #0d0c0c;
  transform: translateY(-4px);
}

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

@media (max-width: 900px) {
  .desktop-nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }

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

@media (max-width: 600px) {
  .nav-inner {
    padding: 0.8rem 1.2rem;
  }

  .hero,
  .section {
    padding: 3rem 1.2rem;
  }

  .cta-group {
    flex-direction: column;
  }

  .timeline {
    margin-left: 1rem;
  }

  .back-to-top {
    right: 1rem;
    bottom: 1rem;
  }
}