:root {
  --bg: #0b0b10;
  --bg-panel: #131319;
  --border: rgba(255, 255, 255, 0.08);
  --accent: #8579c9;
  --accent-strong: #9d92dd;
  --text-main: #e8e6ef;
  --text-dim: #94919f;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

img {
  max-width: 100%;
}

::selection {
  background: var(--accent);
  color: var(--bg);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(11, 11, 16, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
}

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

.nav-links {
  display: flex;
  gap: 2rem;
  font-size: 0.95rem;
}

.nav-links a {
  color: var(--text-dim);
  transition: color 0.2s ease;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 60;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-main);
}

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 1.5rem 4rem;
}

.hero-content {
  position: relative;
  max-width: 640px;
}

.eyebrow {
  color: var(--text-dim);
  font-size: 1.05rem;
  margin-bottom: 0.6rem;
}

.hero-title {
  font-size: clamp(2.2rem, 7vw, 3.6rem);
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.hero-buttons {
  margin-top: 2.2rem;
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.7rem 1.6rem;
  border-radius: 6px;
  border: 1px solid transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn.big {
  font-size: 1rem;
  padding: 0.85rem 2rem;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--accent-strong);
}

.btn-outline {
  color: var(--text-main);
  background: transparent;
  border-color: var(--border);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 5.5rem 1.5rem;
}

.section-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 2.2rem;
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.section-title .tag {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--accent-strong);
}

.section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: start;
}

.about-text p {
  font-size: 1.05rem;
  color: var(--text-dim);
  margin-bottom: 1.1rem;
}

.about-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 1.4rem;
}

.facts-list li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
  font-size: 0.95rem;
}

.facts-list li + li {
  border-top: 1px solid var(--border);
}

.fact-label {
  color: var(--text-dim);
}

.fact-value {
  color: var(--text-main);
  text-align: right;
  font-weight: 500;
}

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

.projects-more {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.95rem;
  margin-top: 2rem;
}

.projects-more a {
  color: var(--accent-strong);
  font-weight: 500;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.projects-more a:hover {
  border-color: var(--accent-strong);
}

.project-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.6rem;
  transition: border-color 0.2s ease;
}

.project-card:hover {
  border-color: rgba(255, 255, 255, 0.16);
}

.project-card.featured {
  position: relative;
  border-color: var(--accent);
  background: linear-gradient(180deg, rgba(133, 121, 201, 0.08), var(--bg-panel) 60%);
}

.project-card.featured:hover {
  border-color: var(--accent-strong);
}

.featured-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--accent-strong);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  margin-bottom: 0.8rem;
}

.project-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.7rem;
}

.project-card p {
  color: var(--text-dim);
  font-size: 0.95rem;
  margin-bottom: 1.1rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.1rem;
}

.project-tags span {
  font-size: 0.8rem;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
}

.project-link {
  color: var(--accent-strong);
  font-size: 0.95rem;
  font-weight: 500;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.project-link:hover {
  border-color: var(--accent-strong);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  gap: 1rem;
}

.skill-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 0.6rem;
  transition: border-color 0.2s ease;
}

.skill-badge img {
  width: 30px;
  height: 30px;
  object-fit: contain;
  filter: grayscale(60%) opacity(0.8);
  transition: filter 0.2s ease;
}

.skill-badge span {
  font-size: 0.85rem;
  color: var(--text-dim);
  text-align: center;
}

.skill-badge:hover {
  border-color: rgba(255, 255, 255, 0.16);
}

.skill-badge:hover img {
  filter: grayscale(0%) opacity(1);
}

.contact-section {
  text-align: center;
}

.contact-text {
  color: var(--text-dim);
  font-size: 1.05rem;
  margin-bottom: 1.8rem;
}

.contact-page {
  max-width: 1100px;
  text-align: center;
  padding-top: 8rem;
}

.contact-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: 700px;
  margin: 2.5rem auto 0;
  text-align: left;
}

.pgp-fingerprint {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 1.1rem;
  word-break: break-all;
}

.site-footer {
  text-align: center;
  padding: 2rem 1.5rem;
  color: var(--text-dim);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
}

.section {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

@media (max-width: 800px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    height: 100vh;
    width: 70%;
    max-width: 280px;
    background: var(--bg-panel);
    flex-direction: column;
    padding: 6rem 2rem;
    gap: 2rem;
    border-left: 1px solid var(--border);
    transition: right 0.3s ease;
  }

  .nav-links.is-open {
    right: 0;
  }

  .facts-list li {
    flex-direction: column;
    gap: 0.2rem;
  }

  .fact-value {
    text-align: left;
  }

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