/* ====================================
   THEME TOGGLE + LIGHT MODE
   Dark is the default; light applies when <html data-theme="light">.
   Load this after the page stylesheets so its overrides win.
   ==================================== */
:root { color-scheme: dark; }

/* —— Toggle button (top-right, inside the sticky navbar) —— */
.theme-toggle {
  position: absolute;
  top: 50%;
  right: 20px;
  transform: translateY(-50%);
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid var(--theme-toggle-border);
  border-radius: 50%;
  background: var(--theme-toggle-bg);
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.theme-toggle:hover { color: var(--text); }
.theme-toggle:focus-visible {
  outline: 2px solid var(--accent-violet);
  outline-offset: 2px;
}
.theme-toggle svg { display: block; }
.theme-toggle.is-switching svg {
  animation: theme-icon-in 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes theme-icon-in {
  from { transform: rotate(-90deg) scale(0.4); opacity: 0; }
  to   { transform: none; opacity: 1; }
}

/* Theme switch: circular reveal (View Transitions) or color crossfade.
   .theme-vt is set on <html> only while the theme is switching. */
html.theme-vt::view-transition-old(root),
html.theme-vt::view-transition-new(root) {
  animation: none;
  mix-blend-mode: normal;
}
html.theme-vt .navbar,
html.theme-vt .nav-br { view-transition-name: none; }

/* —— Page-to-page transitions (About / Research / Arts) ——
   The navbar stays put, brackets glide to the new tab, and the page
   slides in the direction of travel (js/page-transitions.js sets it). */
@view-transition { navigation: auto; }

.navbar { view-transition-name: navbar; }
.navbar li { position: relative; }

/* Brackets around the active tab; each glides to the new tab on navigation */
.nav-br {
  position: absolute;
  top: 50%;
  transform: translateY(-54%);
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--accent-violet);
  pointer-events: none;
}
.nav-br--l { left: -0.75em;  view-transition-name: nav-br-l; }
.nav-br--r { right: -0.75em; view-transition-name: nav-br-r; }
.navbar ul { isolation: isolate; }

::view-transition-group(navbar) { animation: none; }
::view-transition-old(navbar),
::view-transition-new(navbar) { animation: none; }

/* Springy glide for the brackets (the right one trails a touch) */
::view-transition-group(nav-br-l),
::view-transition-group(nav-br-r) {
  animation-duration: 0.5s;
  animation-timing-function: cubic-bezier(0.34, 1.4, 0.5, 1);
}
::view-transition-group(nav-br-r) { animation-delay: 0.04s; }

/* Default (no direction known): fade and lift */
::view-transition-old(root) { animation: page-fade-out 0.22s ease-in both; }
::view-transition-new(root) { animation: page-lift-in 0.42s cubic-bezier(0.2, 0.7, 0.2, 1) 0.05s both; }

/* Forward (About → Research → Arts): slide left; backward: slide right */
html:active-view-transition-type(forward)::view-transition-old(root) {
  animation: slide-out-left 0.32s cubic-bezier(0.5, 0, 0.75, 0) both;
}
html:active-view-transition-type(forward)::view-transition-new(root) {
  animation: slide-in-right 0.5s cubic-bezier(0.2, 0.8, 0.2, 1) 0.08s both;
}
html:active-view-transition-type(backward)::view-transition-old(root) {
  animation: slide-out-right 0.32s cubic-bezier(0.5, 0, 0.75, 0) both;
}
html:active-view-transition-type(backward)::view-transition-new(root) {
  animation: slide-in-left 0.5s cubic-bezier(0.2, 0.8, 0.2, 1) 0.08s both;
}

@keyframes page-fade-out  { to   { opacity: 0; } }
@keyframes page-lift-in   { from { opacity: 0; transform: translateY(12px); } }
@keyframes slide-out-left  { to   { opacity: 0; transform: translateX(-70px); } }
@keyframes slide-out-right { to   { opacity: 0; transform: translateX(70px); } }
@keyframes slide-in-right  { from { opacity: 0; transform: translateX(70px); } }
@keyframes slide-in-left   { from { opacity: 0; transform: translateX(-70px); } }

@media (prefers-reduced-motion: reduce) {
  @view-transition { navigation: none; }
}

.theme-anim,
.theme-anim *,
.theme-anim *::before,
.theme-anim *::after {
  transition: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease,
              fill 0.4s ease, box-shadow 0.4s ease, text-decoration-color 0.4s ease !important;
}

@media (prefers-reduced-motion: reduce) {
  .theme-toggle.is-switching svg { animation: none; }
}

/* Show the sun in dark mode (click for light), the moon in light mode */
.theme-toggle .icon-moon { display: none; }
:root[data-theme="light"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: block; }

:root {
  --theme-toggle-bg: rgba(255, 255, 255, 0.04);
  --theme-toggle-border: rgba(255, 255, 255, 0.16);
}

@media (max-width: 700px) {
  .theme-toggle { right: 12px; width: 32px; height: 32px; }
  .theme-toggle svg { width: 16px; height: 16px; }
}

/* ====================================
   LIGHT PALETTE
   ==================================== */
:root[data-theme="light"] {
  color-scheme: light;

  --bg: #ffffff;
  --text: #1b1c1f;
  --text-muted: #5d5f67;
  --accent-violet: #7442d6;
  --accent-coral: #d9442f;
  --accent-ascii-yellow: #9a7200;
  --accent-cyan: #0a87b8;

  --theme-toggle-bg: #fff;
  --theme-toggle-border: rgba(0, 0, 0, 0.12);
}

/* —— Global —— */
:root[data-theme="light"] .navbar { background: rgba(240, 240, 238, 0.9); }
:root[data-theme="light"] .site-name::before { background: rgba(255, 214, 0, 0.3); }

/* —— About —— */
:root[data-theme="light"] .about-hero,
:root[data-theme="light"] .about-inline-photo { border-color: rgba(0, 0, 0, 0.12); }
:root[data-theme="light"] .rule { border-top-color: rgba(0, 0, 0, 0.2); }

/* Term chips: highlighter stroke across the lower half, like the name */
:root[data-theme="light"] .term-chip {
  --chip-hl: rgba(56, 189, 248, 0.38);
  background: linear-gradient(transparent 52%, var(--chip-hl) 52%);
}
:root[data-theme="light"] .term-chip--teal   { --chip-hl: rgba(45, 212, 191, 0.4); }
:root[data-theme="light"] .term-chip--coral  { --chip-hl: rgba(255, 111, 97, 0.38); }
:root[data-theme="light"] .term-chip--yellow { --chip-hl: rgba(255, 214, 0, 0.5); }
:root[data-theme="light"] .term-chip--lime   { --chip-hl: rgba(163, 230, 53, 0.5); }

/* ASCII garden: vivid, poppy colors that still hold up on white */
:root[data-theme="light"] .ascii-art { font-weight: 700; }
:root[data-theme="light"] .ascii-art font[color="#FFFF00"] { color: #f5b800; }
:root[data-theme="light"] .ascii-art font[color="#FFFF80"] { color: #ffc61a; }
:root[data-theme="light"] .ascii-art font[color="#FF8000"] { color: #ff7a00; }
:root[data-theme="light"] .ascii-art font[color="#FF0000"] { color: #ff2d2d; }
:root[data-theme="light"] .ascii-art font[color="#FF00FF"] { color: #e60fb4; }
:root[data-theme="light"] .ascii-art font[color="#FF80FF"] { color: #ff5fd2; }
:root[data-theme="light"] .ascii-art font[color="#0000FF"] { color: #1f5cff; }
:root[data-theme="light"] .ascii-art font[color="#00FF00"] { color: #1fbf3a; }
:root[data-theme="light"] .ascii-art font[color="#008000"] { color: #0e8a2a; }

/* —— Research —— */
:root[data-theme="light"] body.research {
  --rule: rgba(0, 0, 0, 0.12);
  --tile-bg: #f2f2f0;
}
:root[data-theme="light"] .pub-thumb--type {
  background:
    repeating-linear-gradient(0deg, transparent 0 23px, rgba(0, 0, 0, 0.04) 23px 24px),
    var(--tile-bg);
}
/* Bright accents (yellow, lime, teal) need darkening when used as text */
:root[data-theme="light"] .pub-authors .me,
:root[data-theme="light"] .pub-links a,
:root[data-theme="light"] .pub-venue .rank,
:root[data-theme="light"] .pub-thumb--type b {
  color: color-mix(in srgb, var(--pub-accent) 62%, #000);
}
:root[data-theme="light"] .pub-venue .rank {
  border-color: color-mix(in srgb, var(--pub-accent) 62%, #000);
}
:root[data-theme="light"] .chip {
  border-color: rgba(0, 0, 0, 0.16);
  background: rgba(0, 0, 0, 0.04);
}
:root[data-theme="light"] .chip:hover { background: rgba(0, 0, 0, 0.08); }

/* —— Arts —— */
:root[data-theme="light"] body.arts .work { background: #f2f2f0; }
:root[data-theme="light"] body.arts .overlay { background: rgba(255, 255, 255, 0.8); }

:root[data-theme="light"] body.arts dialog.lb { background: var(--bg); }
:root[data-theme="light"] body.arts dialog.lb::backdrop { background: rgba(255, 255, 255, 0.88); }
:root[data-theme="light"] body.arts .lb-stage { background: #f2f2f0; }
:root[data-theme="light"] body.arts .lb-nav {
  border-color: rgba(0, 0, 0, 0.16);
  background: rgba(255, 255, 255, 0.85);
}
:root[data-theme="light"] body.arts .lb-side { border-color: rgba(0, 0, 0, 0.1); }
:root[data-theme="light"] body.arts .lb-close { border-color: rgba(0, 0, 0, 0.16); }
:root[data-theme="light"] body.arts .lb-thumbs button {
  border-color: rgba(0, 0, 0, 0.12);
  background: #f2f2f0;
}
:root[data-theme="light"] body.arts .lb-thumbs button[aria-current="true"] { border-color: var(--text); }

/* —— About: profile card —— */
:root[data-theme="light"] {
  --card-bg: #ffffff;
  --card-border: rgba(0, 0, 0, 0.1);
}
:root[data-theme="light"] .profile-card { box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05); }