/* climate · time · sound — reduced dark aesthetic: monochrome + signal red */

:root {
  --bg: #0c0c0e;
  --bg2: #121216;
  --bg3: #1a1a20;
  --line: #24242c;
  --tx: #e8e8ec;
  --tx2: #9a9aa4;
  --tx3: #63636e;
  --red: #e6392f;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --sans: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* light theme — warm paper, signal red kept for identity */
:root[data-theme="light"] {
  --bg: #f7f6f3;
  --bg2: #ffffff;
  --bg3: #edece7;
  --line: #dcdad3;
  --tx: #1e1e22;
  --tx2: #5a5851;
  --tx3: #8d8b83;
  --red: #d42a20;
}

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

body {
  background: var(--bg);
  color: var(--tx);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  min-height: 100vh;
}

.mono { font-family: var(--mono); font-size: 12px; }

/* ------------------------------------------------------------- header --- */
.top {
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
  padding: 18px 26px 14px;
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px); z-index: 10;
}
.brand { display: flex; flex-direction: column; margin-right: auto; }
.brand-main { font-family: var(--mono); font-size: 17px; letter-spacing: 0.06em; }
.brand-sub { color: var(--tx3); font-size: 12.5px; }

.modes { display: flex; gap: 4px; background: var(--bg3); padding: 4px; border-radius: 9px; }
.mode-btn {
  background: none; border: none; color: var(--tx2);
  font-family: var(--mono); font-size: 13px; letter-spacing: 0.04em;
  padding: 7px 16px; border-radius: 6px; cursor: pointer;
}
.mode-btn:hover { color: var(--tx); }
.mode-btn.active { background: var(--bg); color: var(--tx); box-shadow: 0 0 0 1px var(--line); }

.langs { display: flex; gap: 2px; }
.lang-btn {
  background: none; border: 1px solid transparent; color: var(--tx3);
  font-family: var(--mono); font-size: 12px; padding: 5px 9px; border-radius: 6px; cursor: pointer;
}
.lang-btn.active { color: var(--tx); border-color: var(--line); background: var(--bg3); }

.theme-btn {
  background: var(--bg3); border: 1px solid var(--line); color: var(--tx2);
  font-size: 14px; line-height: 1; padding: 6px 9px; border-radius: 6px; cursor: pointer;
}
.theme-btn:hover { color: var(--tx); border-color: var(--tx3); }

/* -------------------------------------------------------------- stage --- */
main { max-width: 1100px; margin: 0 auto; padding: 22px 26px 40px; }

.stage {
  background: var(--bg2); border: 1px solid var(--line); border-radius: 12px;
  padding: 14px; margin-bottom: 26px;
}
#viz { width: 100%; height: 260px; display: block; border-radius: 8px; }

.transport {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  margin-top: 12px;
}
.btn {
  background: var(--bg3); color: var(--tx); border: 1px solid var(--line);
  font-family: var(--mono); font-size: 13px;
  padding: 9px 16px; border-radius: 8px; cursor: pointer; white-space: nowrap;
}
.btn:hover { border-color: var(--tx3); }
.btn:disabled { opacity: 0.5; cursor: wait; }
.btn.primary { background: var(--red); border-color: var(--red); color: #fff; min-width: 130px; }
.btn.primary:hover { filter: brightness(1.12); }

#seek {
  -webkit-appearance: none; appearance: none;
  flex: 1; min-width: 120px; height: 5px; border-radius: 3px;
  background: var(--bg3); cursor: pointer; outline: none;
}
#seek::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--tx); border: 2px solid var(--bg); cursor: ew-resize;
}
#seek::-moz-range-thumb {
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--tx); border: 2px solid var(--bg); cursor: ew-resize;
}
#seek::-moz-range-track { background: transparent; }
#time-disp { color: var(--tx3); min-width: 88px; }
.share-msg { color: var(--tx3); font-size: 12.5px; }

.legend {
  display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap;
  margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--line);
}
.legend-kicker { font-family: var(--mono); font-size: 11px; color: var(--red); letter-spacing: 0.08em; }
.stage-hint { margin-top: 8px; font-size: 11.5px; line-height: 1.5; }
body[data-mode="paleo"] .stage-hint { display: none; }
#legend-live { color: var(--tx); }
#legend-rule.rule { color: var(--tx3); }

/* ------------------------------------------------------------- panels --- */
.panel { display: none; }
body[data-mode="learn"] .panel-learn { display: block; }
body[data-mode="studio"] .panel-studio { display: block; }
body[data-mode="classic"] .panel-classic { display: block; }
body[data-mode="paleo"] .panel-paleo { display: block; }

.loop-box { display: none; }
body[data-mode="studio"] .loop-box,
body[data-mode="classic"] .loop-box { display: block; }

.signalweg { display: flex; gap: 10px; align-items: center; margin-bottom: 16px; }
.sw {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em;
  border: 1px solid var(--line); border-radius: 999px; padding: 4px 14px; color: var(--tx2);
}
.sw-a { color: var(--red); }

.learn-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px; margin-bottom: 30px;
}
.card {
  background: var(--bg2); border: 1px solid var(--line); border-radius: 12px;
  padding: 18px;
}
.card h3, .sec-h, .didactic h3 {
  font-family: var(--mono); font-size: 13px; font-weight: 500;
  letter-spacing: 0.06em; color: var(--tx); margin-bottom: 10px;
}
.sec-h { margin: 26px 0 6px; }
.card label { display: block; font-size: 13px; color: var(--tx2); margin: 12px 0 5px; }
.card label:first-of-type { margin-top: 4px; }

select, input[type="text"] {
  width: 100%; background: var(--bg3); color: var(--tx);
  border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px;
  font-size: 14px; font-family: inherit;
}
select:focus { outline: 1px solid var(--tx3); }

.hint { color: var(--tx3); font-size: 12.5px; margin: 6px 0 2px; }
.hint.wide { max-width: 760px; margin-bottom: 18px; }

.range2 { position: relative; height: 30px; }
.range2 input[type="range"] {
  position: absolute; left: 0; right: 0; top: 8px; width: 100%;
  -webkit-appearance: none; appearance: none; background: none; pointer-events: none; height: 14px;
}
.range2 input[type="range"]::-webkit-slider-runnable-track { height: 3px; background: var(--bg3); border-radius: 2px; }
.range2 input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none; pointer-events: auto;
  width: 15px; height: 15px; border-radius: 50%;
  background: var(--tx); border: 2px solid var(--bg); margin-top: -6px; cursor: ew-resize;
}
.range2 input[type="range"]::-moz-range-track { height: 3px; background: var(--bg3); }
.range2 input[type="range"]::-moz-range-thumb {
  pointer-events: auto; width: 13px; height: 13px; border-radius: 50%;
  background: var(--tx); border: 2px solid var(--bg); cursor: ew-resize;
}

.toggles { margin-top: 14px; }
.toggles-head { font-family: var(--mono); font-size: 12px; color: var(--red); letter-spacing: 0.06em; }
.tgl {
  display: flex; align-items: center; gap: 9px;
  padding: 6px 0; font-size: 13.5px; color: var(--tx2); cursor: pointer;
}
.tgl input { accent-color: var(--red); width: 15px; height: 15px; }
.tgl:hover span { color: var(--tx); }

/* ------------------------------------------------------- experiments ---- */
.exp-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 14px; margin: 14px 0 10px;
}
.exp-card {
  background: var(--bg2); border: 1px solid var(--line); border-radius: 12px;
  padding: 16px; display: flex; flex-direction: column; gap: 8px;
  text-align: left; color: var(--tx); font: inherit;
}
button.exp-card { cursor: pointer; }
button.exp-card:hover, .exp-card.active { border-color: var(--tx3); }
.exp-card.active { outline: 1px solid var(--red); }
.exp-title { font-family: var(--mono); font-size: 13.5px; letter-spacing: 0.03em; }
.exp-sub { color: var(--tx3); font-size: 12.5px; line-height: 1.5; }
.exp-ab { display: flex; gap: 8px; }
.exp-btn {
  align-self: flex-start; background: var(--bg3); border: 1px solid var(--line);
  color: var(--tx); font-family: var(--mono); font-size: 12px;
  padding: 7px 14px; border-radius: 7px; cursor: pointer;
}
.exp-btn:hover { border-color: var(--red); }

/* ------------------------------------------------------------- studio --- */
.loop-box {
  background: var(--bg2); border: 1px solid var(--line); border-radius: 12px;
  padding: 12px 16px; margin-bottom: 16px;
}
.loop-box .hint { margin: 2px 0 4px 24px; }
.len-row { display: flex; align-items: center; gap: 12px; margin: 2px 0 12px; flex-wrap: wrap; }
.len-label { font-family: var(--mono); font-size: 12px; color: var(--tx3); letter-spacing: 0.04em; }
.seg { display: inline-flex; gap: 3px; background: var(--bg3); padding: 3px; border-radius: 8px; }
.seg-btn {
  background: none; border: none; color: var(--tx3);
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.02em;
  padding: 5px 12px; border-radius: 6px; cursor: pointer; white-space: nowrap;
}
.seg-btn:hover { color: var(--tx); }
.seg-btn.active { background: var(--bg); color: var(--tx); box-shadow: 0 0 0 1px var(--line); }
.loop-status { color: var(--red); min-height: 16px; margin-left: 24px; }

.style-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 14px;
}
.style-card {
  background: var(--bg2); border: 1px solid var(--line); border-radius: 12px;
  padding: 16px; text-align: left; cursor: pointer; color: var(--tx); font: inherit;
  display: flex; flex-direction: column; gap: 7px;
}
.style-card:hover { border-color: var(--tx3); }
.style-card.active { outline: 1px solid var(--red); border-color: var(--red); }
.sc-title { font-family: var(--mono); font-size: 14px; letter-spacing: 0.02em; }
.sc-desc { color: var(--tx2); font-size: 12.5px; line-height: 1.5; }
.sc-meta { color: var(--tx3); font-size: 11.5px; font-family: var(--mono); margin-top: auto; }

/* -------------------------------------------------------------- paleo --- */
/* the symphony is the paleo main act; the lab steps back behind it */
body[data-appr="sinfonie"] .paleo-lab-only { display: none; }
body:not([data-appr="sinfonie"]) .symph-only { display: none; }

#symph-program { display: flex; flex-direction: column; gap: 8px; margin: 12px 0 10px; }
.symph-row {
  display: flex; align-items: baseline; gap: 14px; text-align: left;
  background: var(--bg2); border: 1px solid var(--line); border-radius: 10px;
  padding: 12px 16px; cursor: pointer; color: var(--tx); font: inherit;
}
.symph-row:hover { border-color: var(--red); }
.symph-num {
  flex: none; width: 34px; font-family: var(--mono); font-size: 17px;
  color: var(--red); letter-spacing: 0.04em;
}
.symph-body { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.symph-t { font-family: var(--mono); font-size: 13.5px; }
.symph-d { color: var(--tx3); font-size: 12.5px; line-height: 1.5; }
.symph-age { flex: none; color: var(--tx3); font-size: 11px; }
#symph-detected { margin: 4px 0 14px; color: var(--red); }

.paleo-top { margin: 4px 0 20px; }
.paleo-top .len-row { margin-bottom: 6px; }
#appr-hint { max-width: 760px; }
.paleo-advanced {
  margin: 22px 0 6px; border: 1px solid var(--line); border-radius: 10px;
  padding: 0 16px; background: var(--bg2);
}
.paleo-advanced > summary {
  cursor: pointer; padding: 12px 2px; font-family: var(--mono); font-size: 12px;
  color: var(--tx2); letter-spacing: 0.04em; list-style-position: inside;
}
.paleo-advanced[open] > summary { color: var(--tx); border-bottom: 1px solid var(--line); margin-bottom: 12px; }
.paleo-advanced > summary:hover { color: var(--tx); }
body[data-appr="struktur"] #paleo-tracks-wrap { display: block; }
#paleo-tracks-wrap { display: none; }
.paleo-controls { display: flex; gap: 22px; flex-wrap: wrap; margin: 18px 0; }
.paleo-controls label { display: block; font-size: 13px; color: var(--tx2); margin-bottom: 5px; }
.paleo-controls select { width: auto; min-width: 160px; }
.paleo-controls .hint { display: block; }

.paleo-row {
  display: grid; grid-template-columns: 64px 2.2fr 0.9fr 0.9fr 1.1fr 1.3fr; gap: 10px;
  align-items: center; margin-bottom: 8px;
}
.paleo-row-n { font-family: var(--mono); font-size: 12px; color: var(--tx3); }
.paleo-slider { display: flex; flex-direction: column; gap: 2px; }
.paleo-slider span { font-family: var(--mono); font-size: 10.5px; color: var(--tx3); white-space: nowrap; }
.paleo-slider input[type="range"] { width: 100%; accent-color: var(--red); height: 18px; }
#paleo-periods { margin: 4px 0 10px; }

/* --------------------------------------------------------- style modal --- */
.sc-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.sc-info {
  flex: none; width: 22px; height: 22px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--line); color: var(--tx3);
  font-family: var(--mono); font-size: 12px; font-style: normal;
}
.style-card:hover .sc-info { border-color: var(--tx3); color: var(--tx); }

.modal {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(6, 6, 8, 0.72); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.modal[hidden] { display: none; }
.modal-box {
  position: relative; background: var(--bg2); border: 1px solid var(--line);
  border-radius: 14px; padding: 26px 28px; max-width: 620px; width: 100%;
  max-height: 84vh; overflow-y: auto;
}
.modal-close {
  position: absolute; top: 10px; right: 12px;
  background: none; border: none; color: var(--tx3);
  font-size: 22px; line-height: 1; cursor: pointer; padding: 6px;
}
.modal-close:hover { color: var(--tx); }
.modal-box h2 { font-family: var(--mono); font-size: 16px; font-weight: 500; letter-spacing: 0.02em; margin-bottom: 2px; }
.modal-meta { color: var(--tx3); font-family: var(--mono); font-size: 12px; margin-bottom: 16px; }
.modal-box h3 {
  font-family: var(--mono); font-size: 12px; font-weight: 500;
  letter-spacing: 0.07em; color: var(--red); margin: 16px 0 6px;
}
.modal-box p { color: var(--tx2); font-size: 13.5px; line-height: 1.6; }
.modal-box p strong, .modal-box p b { color: var(--tx); font-weight: 600; }
.modal-common { border-top: 1px solid var(--line); margin-top: 18px; padding-top: 4px; }
.modal-common p { color: var(--tx3); font-size: 12.5px; }

/* ----------------------------------------------------------- didactic --- */
.didactic {
  background: var(--bg2); border: 1px solid var(--line); border-left: 3px solid var(--red);
  border-radius: 10px; padding: 18px 20px; margin-top: 26px;
}
.didactic p { color: var(--tx2); font-size: 13.5px; max-width: 860px; }
.didactic p + p { margin-top: 8px; }
#paleo-info p { margin-bottom: 8px; }
#paleo-info b { color: var(--tx); font-weight: 500; }

footer {
  border-top: 1px solid var(--line); margin-top: 20px;
  padding: 18px 26px 30px; color: var(--tx3); font-size: 12px;
  max-width: 1100px; margin-left: auto; margin-right: auto;
}

@media (max-width: 640px) {
  .top { padding: 14px 16px 10px; gap: 10px; }
  .brand { width: 100%; }
  main { padding: 16px 14px 30px; }
  #viz { height: 190px; }
  .paleo-row { grid-template-columns: 1fr; gap: 5px; }
  .paleo-row-n { margin-top: 6px; }
}