:root {
  color-scheme: dark light;
  --bg: #0f1115;
  --fg: #e7e9ee;
  --muted: #9aa3b2;
  --accent: #7cc4ff;
  --accent-warm: #b07cff;
  --card: #161922;
  --card-overlay: rgba(22, 25, 34, 0.78);
  --border: #232838;
  --badge-bg: rgba(124, 196, 255, 0.15);
  --badge-muted-bg: rgba(154, 163, 178, 0.12);
  --glow: rgba(124, 80, 255, 0.32);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #fafafa;
    --fg: #14171c;
    --muted: #5b6472;
    --accent: #1769c4;
    --accent-warm: #7a3bff;
    --card: #ffffff;
    --card-overlay: rgba(255, 255, 255, 0.85);
    --border: #e6e8ee;
    --badge-bg: rgba(23, 105, 196, 0.12);
    --badge-muted-bg: rgba(91, 100, 114, 0.10);
    --glow: rgba(122, 59, 255, 0.18);
  }
}

:root[data-theme="dark"] {
  --bg: #0f1115;
  --fg: #e7e9ee;
  --muted: #9aa3b2;
  --accent: #7cc4ff;
  --accent-warm: #b07cff;
  --card: #161922;
  --card-overlay: rgba(22, 25, 34, 0.78);
  --border: #232838;
  --badge-bg: rgba(124, 196, 255, 0.15);
  --badge-muted-bg: rgba(154, 163, 178, 0.12);
  --glow: rgba(124, 80, 255, 0.32);
}

:root[data-theme="light"] {
  --bg: #fafafa;
  --fg: #14171c;
  --muted: #5b6472;
  --accent: #1769c4;
  --accent-warm: #7a3bff;
  --card: #ffffff;
  --card-overlay: rgba(255, 255, 255, 0.85);
  --border: #e6e8ee;
  --badge-bg: rgba(23, 105, 196, 0.12);
  --badge-muted-bg: rgba(91, 100, 114, 0.10);
  --glow: rgba(122, 59, 255, 0.18);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2.5rem 1.25rem;
  position: relative;
  transition: background 0.3s, color 0.3s;
}

.backdrop {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
  opacity: 0.45;
  transition: opacity 0.4s;
}

:root[data-theme="light"] .backdrop { opacity: 0.18; }

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .backdrop { opacity: 0.18; }
}

@media (prefers-reduced-motion: reduce) {
  .backdrop { opacity: 0.25; }
}

main { width: 100%; max-width: 720px; position: relative; }

a { color: var(--accent); }

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.cosmic {
  position: relative;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  overflow: hidden;
  background: radial-gradient(circle at 30% 30%, #1a1438 0%, #050010 75%);
  box-shadow: 0 0 32px var(--glow), 0 0 0 1px var(--border);
  cursor: zoom-in;
  transition: transform 1.4s cubic-bezier(0.16, 1, 0.3, 1),
              opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.25s;
  border: none;
  padding: 0;
  opacity: 1;
  transform: scale(1);
}

.cosmic:hover {
  transform: scale(1.03);
  box-shadow: 0 0 44px var(--glow), 0 0 0 1px var(--accent);
  transition: transform 0.25s, box-shadow 0.25s;
}

.cosmic.entering {
  opacity: 0;
  transform: scale(0.55);
}

@media (prefers-reduced-motion: reduce) {
  .cosmic.entering {
    opacity: 1;
    transform: scale(1);
  }
}

.cosmic #brain-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.cosmic.fullscreen {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  border-radius: 0;
  z-index: 1000;
  cursor: zoom-out;
  box-shadow: none;
  transform: none;
}

.cosmic.fullscreen:hover {
  transform: none;
  box-shadow: none;
}

h1 {
  margin: 0;
  font-size: clamp(2.6rem, 5vw, 3.4rem);
  letter-spacing: -0.028em;
  font-weight: 800;
  line-height: 1.05;
  text-shadow: 0 0 30px rgba(124, 80, 255, 0.32);
}

.tagline {
  color: var(--muted);
  margin: 0.5rem 0 0;
  font-size: 1.06rem;
  max-width: 32rem;
  letter-spacing: -0.005em;
}

@media (prefers-reduced-motion: no-preference) {
  @keyframes hero-text-enter {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
  }
  .hero h1 { animation: hero-text-enter 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.45s both; }
  .hero .tagline { animation: hero-text-enter 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.65s both; }
}

/* Cursor halo: faint themed glow that follows the pointer.
   Driven by --mx / --my CSS vars from JS. */
.cursor-halo {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0;
  transition: opacity 0.4s ease-out;
  background: radial-gradient(
    circle 340px at var(--mx, 50vw) var(--my, 30vh),
    rgba(124, 80, 255, 0.10),
    transparent 70%
  );
}

:root[data-theme="light"] .cursor-halo {
  background: radial-gradient(
    circle 340px at var(--mx, 50vw) var(--my, 30vh),
    rgba(122, 59, 255, 0.06),
    transparent 70%
  );
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .cursor-halo {
    background: radial-gradient(
      circle 340px at var(--mx, 50vw) var(--my, 30vh),
      rgba(122, 59, 255, 0.06),
      transparent 70%
    );
  }
}

.cursor-halo.on { opacity: 1; }

@media (hover: none), (prefers-reduced-motion: reduce) {
  .cursor-halo { display: none; }
}

section {
  background: var(--card-overlay);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  transition: background 0.3s, border-color 0.3s;
}

section h2 {
  margin: 0 0 0.85rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  font-weight: 600;
}

p { margin: 0.5rem 0; }

ul.cards {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.75rem;
}

@media (min-width: 640px) {
  ul.cards.cards-2col { grid-template-columns: 1fr 1fr; }
}

.card {
  padding: 1rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.15s;
  background: var(--card);
  transform-style: preserve-3d;
  will-change: transform;
}

.card:hover {
  border-color: var(--accent);
  box-shadow: 0 12px 32px var(--glow);
}

.card-row {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
}

.card-glyph {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent), var(--accent-warm));
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 0 12px rgba(255, 255, 255, 0.15);
}

.card-glyph::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.4), transparent 60%);
}

.card-glyph[data-hue="violet"] {
  background: linear-gradient(135deg, #7a3bff, #b07cff);
}

.card-glyph[data-hue="muted"] {
  background: linear-gradient(135deg, var(--muted), var(--border));
}

.card-body { flex: 1; min-width: 0; }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.2rem;
}

.card-title { font-weight: 600; }

.badge {
  font-size: 0.65rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: var(--badge-bg);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  white-space: nowrap;
}

.badge.badge-muted {
  background: var(--badge-muted-bg);
  color: var(--muted);
}

.card-desc {
  color: var(--muted);
  font-size: 0.92rem;
  margin: 0.3rem 0 0.5rem;
}

.card-link {
  font-size: 0.88rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.card-link:hover { text-decoration: underline; }

.status p { font-size: 0.95rem; }

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 2rem;
}

footer a { color: var(--muted); }

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

.theme-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--muted);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: color 0.2s, border-color 0.2s, background 0.3s, transform 0.2s;
  z-index: 10;
}

.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: rotate(15deg);
}

.theme-toggle svg { width: 18px; height: 18px; }

.theme-toggle .icon-sun { display: block; }
.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; }

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .theme-toggle .icon-sun { display: none; }
  :root:not([data-theme="dark"]) .theme-toggle .icon-moon { display: block; }
}

:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

.reveal { opacity: 1; transform: none; }

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
  }
  .reveal.in-view {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ----- Music player ----- */

.music .music-empty {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0.4rem 0 0;
}

.music-player {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem 1rem;
  background: var(--card);
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.music-now {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.music-title {
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.music-subtitle {
  font-size: 0.78rem;
  color: var(--muted);
}

.music-scrub-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.music-time {
  font-size: 0.72rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  min-width: 2.6rem;
  text-align: center;
}

input[type=range].music-scrub {
  flex: 1;
  appearance: none;
  -webkit-appearance: none;
  height: 4px;
  border-radius: 4px;
  background: var(--border);
  cursor: pointer;
  outline: none;
}
input[type=range].music-scrub:focus-visible { box-shadow: 0 0 0 2px var(--accent); }
input[type=range].music-scrub::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 0;
  cursor: pointer;
}
input[type=range].music-scrub::-moz-range-thumb {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 0;
  cursor: pointer;
}

.music-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.music-btn {
  appearance: none;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--fg);
  border-radius: 50%;
  width: 36px; height: 36px;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s, transform 0.15s;
}
.music-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}
.music-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.music-btn[disabled] { opacity: 0.4; cursor: not-allowed; }

.music-btn-primary {
  width: 48px; height: 48px;
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
.music-btn-primary:hover {
  background: var(--accent-warm);
  border-color: var(--accent-warm);
  color: var(--bg);
  transform: scale(1.05);
}

.music-list {
  list-style: none;
  padding: 0;
  margin: 0.6rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  max-height: 280px;
  overflow-y: auto;
}

.music-list::-webkit-scrollbar { width: 6px; }
.music-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 6px; }

.music-track-btn {
  appearance: none;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 0.45rem 0.6rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  color: var(--fg);
  text-align: left;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.music-track-btn:hover {
  border-color: var(--border);
  background: rgba(124, 196, 255, 0.05);
}
.music-track-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.music-track-active .music-track-btn {
  border-color: var(--accent);
  background: var(--badge-bg);
  color: var(--accent);
}

.music-track-idx {
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  min-width: 1.5rem;
}
.music-track-active .music-track-idx { color: var(--accent); }

.music-track-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.music-track-dur {
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}
.music-track-active .music-track-dur { color: var(--accent); }

.music-caption {
  font-size: 0.72rem;
  color: var(--muted);
  text-align: center;
  margin: 0.2rem 0 0;
}