:root {
  --bg: #0a0b10;
  --panel: #141722;
  --ink: #e8e1d8;
  --muted: #a8a4a0;
  --red: #ef3642;
  --gold: #d59b2d;
  --line: #2a2d3d;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Courier New", monospace;
  background: radial-gradient(circle at top, #121623 0%, var(--bg) 50%);
  color: var(--ink);
}

.topbar {
  position: sticky;
  top: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  background: rgba(10, 11, 16, 0.92);
  border-bottom: 1px solid var(--line);
}

.brand { font-weight: 700; color: var(--red); letter-spacing: 1px; }
.blink { animation: blink 1s steps(1) infinite; color: var(--gold); }
@keyframes blink { 50% { opacity: 0; } }

nav a {
  color: var(--ink);
  text-decoration: none;
  margin-left: 16px;
  font-size: 0.9rem;
}
nav a:hover { color: var(--gold); }

main { max-width: 1080px; margin: 0 auto; padding: 20px; }

.hero {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 24px;
  align-items: center;
  margin-bottom: 22px;
}
.hero-img {
  width: 100%;
  border: 2px solid var(--red);
  border-radius: 10px;
  box-shadow: 0 0 30px rgba(239, 54, 66, 0.2);
}
.label { color: var(--gold); font-size: 0.8rem; }
h1 { margin: 8px 0 12px; line-height: 1.25; }

.pill-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.pill {
  border: 1px solid var(--line);
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--muted);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 16px;
}
h2 { margin-top: 0; color: var(--red); }
h3 { color: var(--gold); margin-bottom: 6px; }

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

ul, ol { padding-left: 20px; }
.roadmap-done {
  text-decoration-line: line-through;
  text-decoration-thickness: 1px;
  text-decoration-color: currentColor;
}
.small { color: var(--muted); font-size: 0.9rem; }

footer {
  padding: 20px;
  text-align: center;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* Skill link */
.skill-link {
  display: inline-block;
  color: #00d4ff;
  text-decoration: none;
  font-weight: 700;
  padding: 8px 16px;
  border: 1px solid #00d4ff;
  border-radius: 6px;
  transition: all 0.2s ease;
}
.skill-link:hover {
  background: rgba(0, 212, 255, 0.15);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.3);
}

/* Mermaid diagram container */
.mermaid-container {
  background: #0d1117;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  margin: 16px 0;
  overflow-x: auto;
}

.mermaid-container .mermaid {
  display: flex;
  justify-content: center;
}

/* Skill features grid */
.skill-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.skill-features .feature {
  background: rgba(0, 212, 255, 0.05);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 8px;
  padding: 14px;
}

.skill-features .feature h3 {
  font-size: 0.95rem;
  margin-top: 0;
  color: #00d4ff;
}

.skill-features .feature p {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0;
  line-height: 1.4;
}

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .grid { grid-template-columns: 1fr; }
  .skill-features { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  .skill-features { grid-template-columns: 1fr; }
}