/* Core styling */
:root {
  --bg-color: #fff;
  --text-color: #333;
  --link-border: #ccc;
  --link-hover-border: #333;
  --nav-hidden-color: #fff;
  --footer-color: #ccc;
  --gallery-bg: rgba(0, 0, 0, 0.8);
  --gallery-text: #fff;
  --card-border: #ddd;
  --card-hover-border: #999;
  --card-hover-bg: #fafafa;
  --card-text: #555;
  --back-link: #888;
  --back-link-hover: #333;
  --theme-toggle-color: #999;
  --meta-text: #999;
  --desc-text: #555;
}

.dark-theme {
  --bg-color: #111;
  --text-color: #eee;
  --link-border: #444;
  --link-hover-border: #eee;
  --nav-hidden-color: #111;
  --footer-color: #555;
  --gallery-bg: rgba(255, 255, 255, 0.9);
  --gallery-text: #000;
  --card-border: #333;
  --card-hover-border: #666;
  --card-hover-bg: #1a1a1a;
  --card-text: #aaa;
  --back-link: #777;
  --back-link-hover: #eee;
  --theme-toggle-color: #666;
  --meta-text: #999;
  --desc-text: #ccc;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px;
  line-height: 1.6;
  color: var(--text-color);
  background: var(--bg-color);
  transition: background 0.3s ease, color 0.3s ease;
}


/* Header */
header {
  margin-bottom: 1.5em;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header p {
  margin: 0;
  font-weight: bold;
}

/* Links */
a {
  color: var(--text-color);
  text-decoration: none;
  border-bottom: 1px solid var(--link-border);
  transition: border-color 0.2s ease, color 0.2s ease;
}

a:hover {
  border-bottom-color: var(--link-hover-border);
}

.home-link {
  font-weight: bold;
  border: none;
}

.home-link:hover {
  border: none;
  color: var(--text-color);
}

/* Main layout */
main {
  display: flex;
  gap: 4em;
}

/* Navigation */
nav {
  flex-shrink: 0;
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

nav li {
  margin-bottom: 0.8em;
}

nav a {
  border-bottom: none;
}

nav a:hover {
  border-bottom: 1px solid var(--text-color);
}

nav .active a {
  border-bottom: 1px solid var(--text-color);
}

nav .nav-hidden a {
  color: var(--nav-hidden-color);
  border-bottom: none;
  position: relative;
}

nav .nav-hidden a:hover {
  color: var(--nav-hidden-color);
  border-bottom: none;
}

.social-links {
  display: flex;
  gap: 16px;
  margin-top: 24px;
}

.social-links a {
  color: var(--meta-text);
  border-bottom: none !important;
  transition: color 0.2s ease, transform 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.social-links a:hover {
  color: var(--text-color);
  transform: translateY(-2px);
  border-bottom: none !important;
}

/* Theme toggle */
.theme-toggle {
  margin-top: 1.5em;
}

.theme-toggle-top {
  background: none;
  border: none;
  padding: 4px;
  color: var(--theme-toggle-color);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease, transform 0.2s ease;
}

.theme-toggle-top:hover {
  color: var(--text-color);
  transform: scale(1.1);
}

.moon-icon { display: none; }
.sun-icon { display: block; }

.dark-theme .moon-icon { display: block; }
.dark-theme .sun-icon { display: none; }

/* Content section */
.content {
  flex: 1;
  min-width: 0;
}

.content p:first-child {
  margin-top: 0;
}

/* ASCII molecule container */
#ascii-container {
  overflow: hidden;
}

#ascii-container table {
  margin: 0;
  border-collapse: collapse;
}

/* Gears canvas */
#gears-container {
  width: 100%;
  position: relative;
}

#gears-canvas {
  display: block;
  width: 100%;
  touch-action: pan-x; /* allow horizontal scroll, capture vertical swipes for gear shifting */
}


/* Paragraphs */
p {
  margin: 1em 0;
}

/* Footer */
footer {
  position: fixed;
  bottom: 12px;
  left: 0;
  width: 100%;
  text-align: center;
  font-size: 11px;
  color: var(--footer-color);
}

/* Responsive - stack on mobile */
@media (max-width: 600px) {
  body {
    margin: 20px auto;
  }

  main {
    flex-direction: column;
    gap: 2em;
  }
}

/* Gallery */
.gallery {
  margin-top: 2em;
  display: flex;
  gap: 1em;
  align-items: flex-start;
}

.gallery-col {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1em;
}

.gallery-item {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: 4px;
}

.gallery-item img {
  width: 100%;
  display: block;
  border-radius: 4px;
}

.gallery-item a {
  display: block;
  border-bottom: none;
}



/* Bio Header */
.bio-header {
  display: flex;
  align-items: center;
  gap: 2em;
  margin-bottom: 2em;
}

.bio-header img {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

@media (max-width: 600px) {
  .bio-header {
    flex-direction: column;
    text-align: center;
    gap: 1.5em;
  }
}

/* Intuition Explainer UI */
.explainer-container {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5em;
  margin-top: 1em;
}

.explainer-input-group {
  display: flex;
  gap: 1em;
  margin-bottom: 1em;
}

#explainer-input {
  flex-grow: 1;
  padding: 0.8em;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-main);
}

#explainer-submit {
  padding: 0.8em 1.5em;
  background: var(--text-color);
  color: var(--bg-color);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 600;
  transition: opacity 0.2s;
}

#explainer-submit:hover {
  opacity: 0.8;
}

#explainer-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.explainer-status {
  font-size: 0.85em;
  color: var(--text-muted);
  margin-bottom: 1em;
  font-family: var(--font-mono);
}

.explainer-output {
  min-height: 50px;
  padding: 1em;
  background: var(--bg-color);
  border-radius: 4px;
  border: 1px solid var(--border);
  line-height: 1.6;
}


.gallery-item figcaption {
  position: absolute;
  inset: 0;
  background: var(--gallery-bg);
  color: var(--gallery-text);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1em;
  font-size: 0.9em;
  line-height: 1.4;
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.gallery-item figcaption > span {
  display: block;
  text-align: center;
}

.gallery-item figcaption a {
  color: inherit;
  pointer-events: auto;
}

.gallery-item:hover figcaption,
.gallery-item:focus-within figcaption {
  opacity: 1;
}

.gallery-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

@media (max-width: 600px) {
  .gallery {
    flex-direction: column;
  }
}

/* Touch devices: hover doesn't exist, so show captions below the image */
@media (hover: none) {
  .gallery-item figcaption {
    position: static;
    background: transparent;
    color: inherit;
    opacity: 1;
    padding: 0.5em 0 0 0;
    text-align: left;
    font-size: 0.85em;
  }
}

/* Theses — choose-your-own-adventure chooser */
.thesis-chooser {
  margin-top: 1em;
}

.thesis-chooser > p:first-child {
  color: var(--card-text);
  margin-bottom: 1em;
}

.thesis-card {
  display: block;
  padding: 1.2em 1.4em;
  margin-bottom: 1em;
  border: 1px solid var(--card-border);
  border-radius: 6px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.thesis-card:hover {
  border-color: var(--card-hover-border);
  background: var(--card-hover-bg);
}

.thesis-card h3 {
  margin: 0 0 0.4em 0;
  font-size: 1.1em;
}

.thesis-card p {
  margin: 0;
  color: var(--card-text);
  font-size: 0.95em;
  line-height: 1.5;
}

.thesis-section {
  display: none;
}

.thesis-section:target {
  display: block;
}

body:has(.thesis-section:target) .thesis-chooser {
  display: none;
}

.thesis-back {
  font-size: 0.9em;
  margin: 0 0 1.5em 0;
}

.thesis-back a {
  color: var(--back-link);
  border-bottom: none;
}

.thesis-back a:hover {
  color: var(--back-link-hover);
}

/* Blog Posts */
.post-meta {
  color: var(--meta-text);
  font-size: 0.9em;
}

.post-desc {
  color: var(--desc-text);
  font-size: 0.95em;
}

.post-backlink {
  font-size: 0.9em;
}