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

:root {
  --bg: #0a0a0a;
  --fg: #d4d4d4;
  --fg-dim: #737373;
  --accent: #6ee7b7;
  --accent-dim: #34d399;
  --font: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Monaco, Consolas, monospace;
}

@media (prefers-color-scheme: light) {
  :root:not(.dark) {
    --bg: #fafafa;
    --fg: #1a1a1a;
    --fg-dim: #6b6b6b;
    --accent: #059669;
    --accent-dim: #047857;
  }
}

:root.light {
  --bg: #fafafa;
  --fg: #1a1a1a;
  --fg-dim: #6b6b6b;
  --accent: #059669;
  --accent-dim: #047857;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  min-height: 100vh;
}

#sim {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  opacity: 0.4;
}

@media (prefers-reduced-motion: reduce) {
  #sim {
    display: none;
  }
}

/* Theme toggle */

.theme-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 50;
  background: var(--bg);
  border: 1px solid var(--fg-dim);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--fg-dim);
  transition: color 0.2s ease, border-color 0.2s ease;
  opacity: 0.7;
}

.theme-toggle:hover {
  color: var(--fg);
  border-color: var(--fg);
  opacity: 1;
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  position: absolute;
  transition: opacity 0.2s ease;
}

/* Dark mode: show sun (to switch to light) */
.theme-toggle .icon-sun {
  opacity: 1;
}
.theme-toggle .icon-moon {
  opacity: 0;
}

/* Light mode: show moon (to switch to dark) */
:root.light .theme-toggle .icon-sun,
:root:not(.dark) .theme-toggle .icon-sun {
  opacity: 0;
}
:root.light .theme-toggle .icon-moon,
:root:not(.dark) .theme-toggle .icon-moon {
  opacity: 1;
}

/* Override for explicit dark */
:root.dark .theme-toggle .icon-sun {
  opacity: 1;
}
:root.dark .theme-toggle .icon-moon {
  opacity: 0;
}

@media (prefers-color-scheme: dark) {
  :root:not(.light) .theme-toggle .icon-sun {
    opacity: 1;
  }
  :root:not(.light) .theme-toggle .icon-moon {
    opacity: 0;
  }
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

code {
  font-family: var(--font);
  font-size: 0.85em;
  background: rgba(127, 127, 127, 0.15);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  color: var(--fg-dim);
}

h1 code {
  font-size: 0.6em;
  vertical-align: middle;
  margin-left: 0.25em;
}

a:hover,
a:focus {
  color: var(--accent-dim);
  text-decoration: underline;
}

/* Header */

header {
  margin-bottom: 3rem;
  text-align: center;
}

.photo-container {
  margin-bottom: 1rem;
}

.photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--fg-dim);
  opacity: 0.9;
  transition: opacity 0.2s ease;
}

.photo:hover {
  opacity: 1;
}

h1 {
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

.tagline {
  color: var(--fg-dim);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1rem;
  font-size: 0.85rem;
}

.links a {
  color: var(--fg-dim);
}

.links a:hover {
  color: var(--accent);
}

/* Sections */

section {
  margin-bottom: 2.5rem;
}

h2 {
  font-size: 1rem;
  font-weight: 600;
  text-transform: lowercase;
  color: var(--fg-dim);
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--fg-dim);
  padding-bottom: 0.25rem;
}

section p {
  margin-bottom: 0.75rem;
}

.section-note {
  font-size: 0.85rem;
  color: var(--fg-dim);
  font-style: italic;
}

/* Lists */

ul {
  list-style: none;
}

.timeline li,
.log li,
.talks-list li {
  display: flex;
  gap: 1rem;
  padding: 0.35rem 0;
  font-size: 0.9rem;
  border-bottom: 1px solid transparent;
}

.timeline li:hover,
.log li:hover,
.talks-list li:hover {
  border-bottom-color: var(--fg-dim);
}

.date {
  color: var(--fg-dim);
  flex-shrink: 0;
  min-width: 5rem;
  font-size: 0.85rem;
}

.role,
.entry {
  flex: 1;
}

/* Footer */

footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--fg-dim);
  text-align: center;
  font-size: 0.8rem;
  color: var(--fg-dim);
}

footer p {
  margin-bottom: 0.25rem;
}

.b {
  cursor: pointer;
  opacity: 0.3;
  transition: opacity 0.3s ease;
  user-select: none;
}

.b:hover {
  opacity: 1;
}

/* Cat reveal */

.cat-reveal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 100;
  background: var(--bg);
  border: 2px solid var(--accent);
  border-radius: 8px;
  padding: 1rem;
  text-align: center;
  box-shadow: 0 0 40px rgba(0,0,0,0.5);
  animation: pop-in 0.2s ease;
}

.cat-reveal img {
  max-width: 280px;
  max-height: 280px;
  border-radius: 4px;
}

.cat-reveal p {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: var(--fg);
}

.cat-reveal .close {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: none;
  border: none;
  color: var(--fg-dim);
  font-size: 1.2rem;
  cursor: pointer;
  line-height: 1;
}

.cat-reveal .close:hover {
  color: var(--fg);
}

@keyframes pop-in {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

/* Responsive */

@media (max-width: 480px) {
  main {
    padding: 2rem 1rem;
  }

  h1 {
    font-size: 1.5rem;
  }

  .date {
    min-width: 4rem;
  }

  .timeline li,
  .log li,
  .talks-list li {
    flex-direction: column;
    gap: 0.1rem;
  }
}