:root {
  color-scheme: dark;
  --bg: #060814;
  --surface: rgba(18, 24, 48, 0.9);
  --surface-strong: #11172f;
  --surface-muted: rgba(255, 255, 255, 0.05);
  --text: #f9fbff;
  --muted: #b3bedf;
  --accent: #7f6cff;
  --accent-2: #4debd0;
  --border: rgba(255, 255, 255, 0.08);
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top, rgba(127, 108, 255, 0.18), transparent 24%),
    radial-gradient(circle at left, rgba(77, 235, 208, 0.12), transparent 18%),
    radial-gradient(circle at right, rgba(60, 120, 255, 0.1), transparent 16%),
    var(--bg);
  color: var(--text);
}

.page-shell {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
  padding: 36px 0 72px;
}

.hero-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(320px, 1fr);
  gap: 32px;
  align-items: start;
  padding: 32px;
  margin-bottom: 48px;
  background: linear-gradient(180deg, rgba(26, 31, 56, 0.95), rgba(18, 23, 46, 0.95));
  border: 1px solid var(--border);
  border-radius: 32px;
  box-shadow: var(--shadow);
  position: relative;
}

.lang-toggle {
  position: absolute;
  top: 20px;
  right: 20px;
}

.toggle-btn {
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 200ms ease;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.toggle-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.hero-copy .eyebrow {
  text-transform: uppercase;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--accent);
  margin-bottom: 16px;
}

.hero-copy h1 {
  margin: 0;
  font-size: clamp(3rem, 4vw, 4.4rem);
  line-height: 0.96;
}

.hero-text {
  margin: 24px 0 0;
  line-height: 1.85;
  max-width: 680px;
  color: var(--muted);
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 200ms ease, box-shadow 200ms ease, background 200ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 18px 40px rgba(127, 108, 255, 0.28);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: var(--text);
}

.hero-panel-meta {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.meta-card {
  padding: 24px;
  border-radius: 28px;
  background: var(--surface);
  border: 1px solid var(--border);
}

.meta-card h2 {
  margin-top: 0;
  font-size: 1.1rem;
}

.meta-card ul {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
}

.meta-card li {
  margin-bottom: 12px;
  color: var(--muted);
}

.tag {
  display: inline-flex;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(77, 235, 208, 0.14);
  color: var(--accent-2);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.section {
  margin-bottom: 56px;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.section h2 {
  font-size: clamp(2rem, 2.4vw, 2.5rem);
  margin: 0 0 20px;
}

.section p,
.section li {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 1fr);
  gap: 24px;
  align-items: start;
}

.code-box {
  position: relative;
  min-height: 320px;
  padding: 24px;
  border-radius: 28px;
  background: rgba(12, 16, 33, 0.94);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.code-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
  margin-bottom: 18px;
}

pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: 'Fira Code', 'Courier New', Courier, monospace;
  font-size: 0.95rem;
  line-height: 1.7;
  color: #d5d7ff;
}

.skills {
  padding: 28px 24px 24px;
  background: linear-gradient(180deg, rgba(19, 24, 47, 0.95), rgba(12, 16, 33, 0.95));
  border-radius: 32px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.skill-grid,
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.skill-card,
.project-card {
  padding: 22px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.project-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.skill-card h3 {
  margin: 0 0 12px;
}

.timeline {
  display: grid;
  gap: 20px;
}

.timeline-card {
  padding: 28px;
  border-radius: 30px;
  background: rgba(13, 18, 36, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.timeline-date {
  display: inline-block;
  margin-bottom: 14px;
  font-size: 0.88rem;
  color: var(--accent-2);
}

.timeline-card h3,
.timeline-card p {
  margin: 0;
}

.timeline-card ul {
  margin: 18px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.timeline-card li {
  margin-bottom: 12px;
}

.education-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.education-list li {
  margin-bottom: 16px;
  padding-left: 16px;
  position: relative;
}

.education-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.8rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.focus-panel {
  padding: 24px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.contact-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.contact-card {
  padding: 24px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.wide-card {
  grid-column: span 2;
}

.site-footer {
  margin-top: 24px;
  padding: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 0 0 28px 28px;
  text-align: center;
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 900px) {
  .hero-panel {
    grid-template-columns: 1fr;
    padding: 24px;
    padding-top: 60px;
  }
  .split {
    grid-template-columns: 1fr;
  }
  .wide-card {
    grid-column: auto;
  }
  .lang-toggle {
    top: 16px;
    right: 16px;
  }
}

@media (max-width: 600px) {
  .page-shell {
    width: min(100%, calc(100% - 24px));
    padding: 24px 0 48px;
  }
  .hero-panel {
    padding: 22px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .project-actions {
    flex-direction: column;
  }
  .hero-panel-meta {
    gap: 16px;
  }
  .hero-text {
    max-width: 100%;
  }
  .code-box {
    min-height: auto;
  }
  .site-footer {
    padding: 18px 14px;
    font-size: 0.9rem;
  }
}