:root {
  --bg: #0f1115;
  --panel: #171a21;
  --text: #e6e8eb;
  --muted: #9aa4b2;
  --accent: #5eead4;
  --accent-dim: #2dd4bf33;
  --radius: 12px;
  --box-bg: rgba(15, 17, 21, 0.82);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* --- Language switch --- */
.lang-switch {
  display: flex;
  justify-content: center;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}
.lang-switch a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  padding: 0.15rem 0.5rem;
  border: 1px solid #ffffff14;
  border-radius: 6px;
}
.lang-switch a:hover { color: var(--text); border-color: var(--accent-dim); }
.lang-switch a.active {
  color: var(--bg);
  background: var(--accent);
  border-color: var(--accent);
}

/* --- Header --- */
.hero {
  max-width: 820px;
  margin: 2rem auto 1rem;
  padding: 3rem 1.5rem 2rem;
  text-align: center;
  background: var(--box-bg);
  backdrop-filter: blur(4px);
  border-radius: 18px;
}
.hero h1 {
  margin: 0;
  font-size: 2.4rem;
  letter-spacing: -0.02em;
}
.tagline {
  color: var(--muted);
  margin: 0.5rem 0 1.5rem;
}
.toc, .links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}
.toc a, .links a {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--accent-dim);
  border-radius: 999px;
}
.toc a:hover, .links a:hover { background: var(--accent-dim); }
.links { margin-top: 0.75rem; }

.visit-note {
  margin: 1.25rem 0 0;
  color: var(--muted);
  font-size: 0.78rem;
  opacity: 0.8;
}

.birthdate {
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--text);
  background: var(--panel);
  border: 1px dashed var(--accent-dim);
  border-radius: 999px;
  padding: 0.3rem 0.8rem;
  margin: 0.75rem 0 0;
  cursor: pointer;
}
.birthdate:hover { border-color: var(--accent); }
.birthdate .cycle-hint {
  display: inline-block;
  color: var(--accent);
  margin-left: 0.2rem;
}

/* --- Sections --- */
main {
  max-width: 820px;
  margin: 0 auto 1rem;
  padding: 1rem 1.5rem;
  background: var(--box-bg);
  backdrop-filter: blur(4px);
  border-radius: 18px;
}
section { padding: 2.5rem 0; border-top: 1px solid #ffffff10; }
section h2 {
  font-size: 1.5rem;
  margin: 0 0 0.5rem;
}
section h2::before {
  content: "# ";
  color: var(--accent);
}
.intro { color: var(--muted); margin-top: 0; }
.sub { margin: 1.8rem 0 0.6rem; color: var(--accent); font-size: 1rem; }

/* --- Cards --- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  align-items: start;
  gap: 1rem;
}
.card {
  position: relative;
  background: var(--panel);
  border: 1px solid #ffffff10;
  border-radius: var(--radius);
  padding: 1.1rem;
  max-height: 220px;
  overflow: hidden;
  cursor: pointer;
  transition: max-height 0.35s ease;
}
.card h3 { margin: 0 0 0.4rem; }
.card p { margin: 0 0 1.2rem; color: var(--muted); }
.card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2.5rem;
  background: linear-gradient(to bottom, transparent, var(--panel));
  border-radius: 0 0 var(--radius) var(--radius);
  pointer-events: none;
  transition: opacity 0.2s ease;
}
.card.expanded {
  max-height: 1200px;
}
.card.expanded::after { opacity: 0; }
.card-hint {
  position: absolute;
  right: 0.9rem;
  bottom: 0.6rem;
  color: var(--accent);
  font-size: 0.85rem;
  transition: transform 0.2s ease;
}
.card.expanded .card-hint { transform: rotate(180deg); }

/* --- Timeline --- */
.timeline { list-style: none; padding: 0; margin: 0; }
.timeline li {
  display: flex;
  gap: 1rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid #ffffff08;
}
.timeline .period {
  flex: 0 0 110px;
  color: var(--accent);
  font-size: 0.85rem;
  padding-top: 0.15rem;
}
.timeline p { margin: 0.2rem 0 0; color: var(--muted); }

/* --- Skills --- */
.skills { display: grid; gap: 0.9rem; margin: 1rem 0; }
.skill-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.3rem;
}
.skill-name { font-weight: 600; }
.skill-note { color: var(--muted); font-size: 0.8rem; text-align: right; }
.bar {
  background: #ffffff10;
  border-radius: 999px;
  height: 8px;
  overflow: hidden;
}
.bar span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #38bdf8);
  border-radius: 999px;
}
.notes { color: var(--muted); padding-left: 1.2rem; margin-top: 1.5rem; }
.notes li { margin: 0.3rem 0; }

/* --- Meta (smaller, quieter) --- */
.meta { opacity: 0.85; }
.meta h2 { font-size: 1.2rem; }
.meta p { color: var(--muted); font-size: 0.92rem; max-width: 60ch; }

/* --- Footer --- */
footer {
  max-width: 820px;
  margin: 0 auto 3rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  padding: 2rem 1.5rem 1.5rem;
  background: var(--box-bg);
  backdrop-filter: blur(4px);
  border-radius: 18px;
}

.hit-counter {
  display: inline-block;
  margin: 0.75rem auto 2rem;
  background: #000;
  color: #4ade80;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  padding: 0.35rem 0.7rem;
  border-radius: 4px;
  border: 1px solid #ffffff14;
  text-shadow: 0 0 6px #4ade8099;
}

/* --- Game of Life background gimmick --- */
#life-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
  display: none;
}
#life-canvas.active { display: block; }

.life-toggle {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  font-family: inherit;
  font-size: 0.78rem;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--accent-dim);
  border-radius: 999px;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  opacity: 0.85;
}
.life-toggle:hover { opacity: 1; background: var(--accent-dim); }
.life-toggle[aria-pressed="true"] {
  border-color: var(--accent);
  color: var(--accent);
}

@media (max-width: 480px) {
  .timeline li { flex-direction: column; gap: 0.2rem; }
  .timeline .period { flex-basis: auto; }
  .skill-note { display: none; }
  .life-toggle { font-size: 0.7rem; padding: 0.4rem 0.7rem; }
}