/*
  Cymatics
  https://evoluteur.github.io/cymatics/
  (c) 2026 Olivier Giulieri
*/

:root {
  --bg: #0b0b18;
  --bg2: #16162e;
  --ink: #ece7dc;
  --muted: #9d97be;
  --accent: #d4af37;
  --accent2: #ffd77a;
  --line: #ffffff1f;
}
* {
  box-sizing: border-box;
}
html {
  color: var(--ink);
  background: var(--bg)
    radial-gradient(circle at 50% 0%, #232048 0%, #12122a 55%, #0b0b18 100%)
    fixed;
  scroll-behavior: smooth;
  min-height: 100%;
}
html,
button,
select,
input {
  font-family: "Marcellus", Georgia, serif;
  font-size: 16px;
}
body {
  margin: 0;
  padding: 0 0 40px;
}
h1,
h2,
h3 {
  font-weight: normal;
  margin: 0;
}
a {
  color: var(--ink);
  transition: color 0.4s;
}
a:hover {
  color: var(--accent2);
}

#header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 12px 20px 10px;
  background: #0b0b18e6;
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
#header h1 {
  display: inline-block;
  font-size: 22px;
  letter-spacing: 0.04em;
}
#header h1 > span {
  color: var(--accent);
}
#header .links {
  float: right;
  padding-top: 6px;
  font-size: 14px;
}
#header .links > a {
  margin-left: 16px;
  text-decoration: none;
}

main {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 24px;
  max-width: 1180px;
  margin: 24px auto;
  padding: 0 20px;
}
@media (max-width: 860px) {
  main {
    grid-template-columns: 1fr;
  }
}

.stage {
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  background: #00000040;
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.stage > canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.panel > h2 {
  font-size: 25px;
  color: var(--accent2);
}
.panel > h2 b {
  font-weight: normal;
  color: var(--ink);
}
.panel > .tagline {
  color: var(--muted);
  font-style: italic;
  margin: 2px 0 12px;
}
.panel > .blurb {
  color: var(--muted);
  line-height: 1.55;
  font-size: 14px;
  margin: 0 0 22px;
}
.panel label {
  display: block;
  margin-bottom: 14px;
  font-size: 14px;
  color: var(--muted);
}
.panel label > span {
  display: block;
  margin-bottom: 4px;
}
.panel label b {
  color: var(--accent2);
  font-weight: normal;
}
input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  cursor: pointer;
}
select {
  width: 100%;
  padding: 6px 8px;
  color: var(--ink);
  background: var(--bg2);
  border: 1px solid var(--line);
  border-radius: 6px;
}
.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}
button {
  flex: 1;
  min-width: 84px;
  padding: 9px 10px;
  color: var(--ink);
  background: #ffffff0f;
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
  transition:
    background 0.3s,
    color 0.3s,
    border-color 0.3s;
}
button:hover {
  color: var(--accent2);
  border-color: #ffd77a66;
  background: #ffffff1a;
}
.steps {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 14px;
}
.steps > button {
  flex: 0 0 40px;
  min-width: 40px;
  padding: 4px 0;
}
.steps > span {
  flex: 1;
  text-align: center;
  font-size: 14px;
  color: var(--muted);
}
.steps > span > b {
  color: var(--accent2);
  font-weight: normal;
}
.hint {
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
  opacity: 0.75;
}

.notes {
  max-width: 1180px;
  margin: 30px auto 0;
  padding: 0 20px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}
.notes h3 {
  color: var(--accent2);
  font-size: 18px;
  margin-bottom: 6px;
}
.notes p {
  margin: 0 0 12px;
  max-width: 70ch;
}

/* the gallery of modes */
.gallery {
  max-width: 1180px;
  margin: 24px auto;
  padding: 0 20px;
}
.gallery h2 {
  color: var(--accent2);
  font-size: 22px;
  margin: 26px 0 4px;
}
.gallery p.lead {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 16px;
  max-width: 70ch;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
}
.tile {
  display: block;
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px;
  background: #00000040;
  transition:
    border-color 0.3s,
    background 0.3s;
}
.tile:hover {
  border-color: #ffd77a66;
  background: #ffffff0f;
}
.tile > canvas {
  width: 100%;
  display: block;
  border-radius: 6px;
}
.tile > .cap {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--muted);
  padding-top: 6px;
}
.tile > .cap > b {
  color: var(--accent2);
  font-weight: normal;
}

footer {
  max-width: 1180px;
  margin: 40px auto 0;
  padding: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}