/* Tidal Glass on Meta Ray-Ban Display.
   The display is additive: black adds no light and reads as see-through, so the page stays black and
   only type, icons, hairlines and the focus glow are lit. Nothing animates on its own, which keeps the
   panel (and the battery) quiet; motion is only feedback for a press or a focus change. */
:root {
  --ink: #ffffff;
  --soft: #d5dbe2;
  --dim: #98a3ae;
  --hair: rgba(255, 255, 255, 0.34);
  --accent: #2fd8ec;
  --accent-soft: rgba(47, 216, 236, 0.2);
  --glow: 0 0 0 3px var(--accent), 0 0 16px rgba(47, 216, 236, 0.55);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

/* Opts the page into Neural Band pinch-and-drag (read once at load); used for volume. */
body { touch-action: none; }

html, body {
  margin: 0;
  inline-size: 100%;
  block-size: 100%;
  background: #000;
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

main { block-size: 100%; position: relative; }

.screen {
  display: flex;
  flex-direction: column;
  gap: 16px;
  block-size: 100%;
  padding: 24px 30px 22px;
  overflow: hidden;
}
.screen.center { justify-content: center; align-items: flex-start; }

svg { fill: currentColor; }

/* ---- top line ---------------------------------------------------------------------------- */
.topline { display: flex; align-items: center; gap: 10px; min-block-size: 22px; font-size: 15px; color: var(--dim); }
.state { display: inline-flex; align-items: center; gap: 8px; min-inline-size: 0; flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dot { inline-size: 8px; block-size: 8px; border-radius: 50%; background: var(--dim); flex: none; }
.dot.live { background: var(--accent); box-shadow: 0 0 8px var(--accent); }
.badges { display: inline-flex; gap: 6px; }
.badge {
  font-size: 12px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--soft); border: 1px solid var(--hair); border-radius: 6px; padding: 2px 6px;
}
.badge.square { padding: 2px 5px; }
.vol { display: inline-flex; align-items: center; gap: 4px; }
.vol svg { inline-size: 15px; block-size: 15px; }

/* ---- track ------------------------------------------------------------------------------- */
.track { display: flex; align-items: center; gap: 20px; min-block-size: 0; }
.artwrap {
  position: relative; flex: none; inline-size: 176px; block-size: 176px;
  border-radius: 18px; overflow: hidden; display: grid; place-items: center;
  box-shadow: inset 0 0 0 1.5px var(--hair);
}
.artwrap img { position: absolute; inset: 0; inline-size: 100%; block-size: 100%; object-fit: cover; }
.artwrap .placeholder { inline-size: 64px; block-size: 64px; color: var(--dim); }
.artwrap.has-art .placeholder { display: none; }
.artwrap.empty { display: none; }

.words { min-inline-size: 0; display: flex; flex-direction: column; gap: 6px; }
h1, h2 {
  margin: 0; font-weight: 750; letter-spacing: -0.01em; overflow-wrap: anywhere;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
h1 { font-size: 34px; line-height: 1.1; }
h2 { font-size: 28px; line-height: 1.12; }
p { margin: 0; }
.artist { font-size: 21px; line-height: 1.2; color: var(--soft); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.album { font-size: 15px; line-height: 1.25; color: var(--dim); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ---- seek ------------------------------------------------------------------------------- */
.seek { padding: 8px 2px 0; border-radius: 12px; outline: none; }
.seek .line { position: relative; block-size: 4px; border-radius: 2px; background: rgba(255, 255, 255, 0.24); }
.seek .fill { position: absolute; inset-block: 0; inset-inline-start: 0; inline-size: 0; border-radius: 2px; background: var(--ink); }
.seek .knob {
  position: absolute; inset-block-start: 50%; inset-inline-start: 0; inline-size: 14px; block-size: 14px;
  margin: -7px 0 0 -7px; border-radius: 50%; background: var(--ink); opacity: 0;
}
.seek .times { display: flex; justify-content: space-between; font-size: 14px; color: var(--dim); margin-top: 7px; font-variant-numeric: tabular-nums; }
.seek:focus { box-shadow: 0 0 0 2px var(--accent); background: var(--accent-soft); }
.seek:focus .knob { opacity: 1; box-shadow: 0 0 10px var(--accent); }
.seek:focus .fill { background: var(--accent); }
.seek.disabled { visibility: hidden; }

/* ---- buttons ---------------------------------------------------------------------------- */
.row { display: flex; justify-content: center; align-items: center; gap: 22px; }
.row.small { gap: 16px; }

button {
  display: inline-grid; place-items: center;
  border: 2px solid var(--hair); background: transparent; color: var(--ink);
  font: inherit; cursor: pointer; padding: 0; outline: none;
  -webkit-tap-highlight-color: transparent;
}
.round { border-radius: 50%; }
.row.main .round { inline-size: 86px; block-size: 86px; }
.row.main .round svg { inline-size: 36px; block-size: 36px; }
.row.main .primary { inline-size: 112px; block-size: 112px; border: 3px solid var(--ink); }
.row.main .primary svg { inline-size: 50px; block-size: 50px; }
.row.small .round { inline-size: 66px; block-size: 66px; }
.row.small .round svg { inline-size: 28px; block-size: 28px; }

button:focus { border-color: var(--accent); background: var(--accent-soft); box-shadow: var(--glow); }
button:active { transform: scale(0.94); }
#like[aria-pressed="true"] { color: var(--accent); border-color: rgba(47, 216, 236, 0.7); }

/* Additive display: a label cannot cover what is behind it, so it gets its own reserved line. */
.tip {
  margin-block-start: -6px; min-block-size: 24px; text-align: center;
  font-size: 19px; font-weight: 650; letter-spacing: 0.01em; color: var(--accent); opacity: 0;
}
.tip.on { opacity: 1; }

.pill-btn { border-radius: 999px; padding: 0 22px 0 16px; block-size: 56px; display: inline-flex; align-items: center; gap: 8px; font-size: 19px; }
.pill-btn svg { inline-size: 22px; block-size: 22px; fill: none; stroke: currentColor; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
#more { padding: 0 16px 0 22px; }

/* ---- lists ------------------------------------------------------------------------------ */
.listhead { display: flex; flex-direction: column; gap: 2px; }
.crumb { font-size: 14px; color: var(--dim); letter-spacing: 0.02em; min-block-size: 17px; }
.note { font-size: 17px; color: var(--soft); }
.note:empty { display: none; }
#items { list-style: none; margin: 0; padding: 2px 4px; display: flex; flex-direction: column; gap: 9px; min-block-size: 0; overflow: auto; scrollbar-width: none; }
#items::-webkit-scrollbar { display: none; }
#items button {
  inline-size: 100%; display: grid; grid-template-columns: 30px minmax(0, 1fr) 18px; place-items: center start;
  gap: 14px; text-align: start; border-radius: 16px; padding: 10px 16px; border-width: 1.5px;
}
#items button > svg { inline-size: 24px; block-size: 24px; color: var(--soft); }
#items button > .chev { inline-size: 18px; block-size: 18px; fill: none; stroke: var(--dim); stroke-width: 2.4; stroke-linecap: round; }
#items .text { inline-size: 100%; min-inline-size: 0; }
#items .ti { display: block; font-size: 20px; line-height: 1.2; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#items .su { display: block; font-size: 15px; color: var(--dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#items .current .ti, #items .current > svg { color: var(--accent); }
.listnav { margin-top: auto; }
.listnav:not(:has(button:not([hidden]))) { display: none; }
#listTitle:focus { outline: none; }

/* ---- Sound Lab -------------------------------------------------------------------------- */
.screen.sound { gap: 10px; padding: 20px 30px 18px; }
.soundhead { display: flex; align-items: center; gap: 14px; min-block-size: 44px; flex: none; }
.soundhead h2 { font-size: 26px; flex: none; -webkit-line-clamp: 1; }
.soundhead .state { font-size: 15px; color: var(--dim); }
.soundhead .hint { justify-content: flex-end; }
.power { block-size: 44px; font-size: 17px; padding: 0 20px; flex: none; }
.power[aria-pressed="true"] { color: var(--accent); border-color: rgba(47, 216, 236, 0.7); }
.sound.off .curvebox, .sound.off .srow, .sound.waiting .curvebox, .sound.waiting .srow { opacity: 0.45; }

.curvebox { flex: none; }
.curve { display: block; inline-size: 100%; block-size: 112px; overflow: visible; }
.curve .zero { stroke: var(--hair); stroke-width: 1; stroke-dasharray: 3 6; }
.curve-line { fill: none; stroke: var(--accent); stroke-width: 3; stroke-linejoin: round; stroke-linecap: round; }
.curve-fill { fill: rgba(47, 216, 236, 0.12); }
.curve circle { fill: var(--soft); }
.curve circle.hot { fill: var(--accent); }
.freqs { position: relative; block-size: 16px; margin-top: 2px; font-size: 12px; color: var(--dim); font-variant-numeric: tabular-nums; }
.freqs span { position: absolute; transform: translateX(-50%); }

.sndrows { display: flex; flex-direction: column; gap: 8px; min-block-size: 0; overflow: auto; scrollbar-width: none; padding: 3px 4px 6px; }
.sndrows::-webkit-scrollbar { display: none; }
.srow {
  flex: none; display: grid; grid-template-columns: 112px minmax(0, 1fr) 96px; align-items: center; gap: 16px;
  min-block-size: 54px; padding: 0 16px; border: 1.5px solid var(--hair); border-radius: 16px; outline: none;
}
.srow .lab { font-size: 20px; }
.srow .val { font-size: 19px; font-weight: 700; text-align: end; font-variant-numeric: tabular-nums; white-space: nowrap; }
.srow .track { position: relative; block-size: 4px; border-radius: 2px; background: rgba(255, 255, 255, 0.24); }
.srow .track .mid { position: absolute; inset-block: -7px; inset-inline-start: 50%; inline-size: 2px; margin-inline-start: -1px; background: var(--hair); }
.srow .track .fill { position: absolute; inset-block: 0; border-radius: 2px; background: var(--ink); }
.srow .track .knob { position: absolute; inset-block-start: 50%; inline-size: 14px; block-size: 14px; margin: -7px 0 0 -7px; border-radius: 50%; background: var(--ink); }
.srow.preset .pval { grid-column: 2 / 4; display: flex; justify-content: space-between; align-items: center; font-size: 21px; font-weight: 700; }
.srow.preset .arrow { color: var(--dim); font-size: 26px; line-height: 1; padding: 0 4px; }
.srow:focus { border-color: var(--accent); background: var(--accent-soft); box-shadow: var(--glow); }
.srow:focus .fill, .srow:focus .knob { background: var(--accent); }
.srow:focus .knob { box-shadow: 0 0 10px var(--accent); }
.srow:focus .arrow { color: var(--accent); }
.sndacts { flex: none; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.sndacts .pill-btn { justify-content: center; inline-size: 100%; border-radius: 16px; block-size: 54px; font-size: 19px; padding: 0 12px; }

.bandcols { flex: 1; display: grid; grid-template-columns: repeat(10, minmax(0, 1fr)); gap: 4px; min-block-size: 0; padding: 4px 2px 2px; }
.bcol {
  display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 10px 0 8px;
  border: 1.5px solid transparent; border-radius: 14px; outline: none; min-block-size: 0;
}
.bcol .bv { font-size: 17px; font-weight: 700; font-variant-numeric: tabular-nums; }
.bcol .bt { position: relative; flex: 1; inline-size: 6px; border-radius: 3px; background: rgba(255, 255, 255, 0.2); }
.bcol .bt .mid { position: absolute; inset-inline: -9px; inset-block-start: 50%; block-size: 2px; margin-block-start: -1px; background: var(--hair); }
.bcol .bt .fill { position: absolute; inset-inline: 0; border-radius: 3px; background: var(--ink); }
.bcol .bt .knob { position: absolute; inset-inline-start: 50%; inline-size: 18px; block-size: 18px; margin: -9px 0 0 -9px; border-radius: 50%; background: var(--ink); }
.bcol .bf { font-size: 14px; color: var(--soft); font-variant-numeric: tabular-nums; }
.bcol .bo { font-size: 14px; font-weight: 700; color: var(--accent); min-block-size: 17px; white-space: nowrap; }
.bcol:focus { border-color: var(--accent); background: var(--accent-soft); box-shadow: var(--glow); }
.bcol:focus .fill, .bcol:focus .knob { background: var(--accent); }

.slotlist { list-style: none; margin: 0; padding: 4px; display: flex; flex-direction: column; gap: 12px; }
.slot {
  display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: center; gap: 10px;
  padding: 10px 12px 10px 18px; border: 1.5px solid var(--hair); border-radius: 18px;
}
.stext { min-inline-size: 0; display: flex; flex-direction: column; gap: 2px; }
.slot .sn { font-size: 21px; font-weight: 700; }
.slot .sd { font-size: 15px; color: var(--dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.slot .pill-btn { block-size: 50px; font-size: 18px; padding: 0 18px; }
.slot .pill-btn[disabled] { opacity: 0.35; }

/* ---- setup ------------------------------------------------------------------------------ */
.hero { inline-size: 72px; block-size: 72px; color: var(--accent); margin-bottom: 8px; }

/* ---- toast ------------------------------------------------------------------------------ */
.toast {
  position: absolute; inset-inline: 0; inset-block-end: 16px; margin-inline: auto; inline-size: max-content; max-inline-size: 80%;
  padding: 9px 18px; border-radius: 999px; border: 1.5px solid rgba(47, 216, 236, 0.6);
  color: var(--ink); font-size: 17px; background: rgba(47, 216, 236, 0.14);
}

@media (prefers-reduced-motion: no-preference) {
  button, .seek { transition: box-shadow 140ms ease, background-color 140ms ease, border-color 140ms ease, transform 90ms ease; }
  .tip { transition: opacity 180ms ease; }
}