/* M.U.S.E — Interactive 3D Atlas. Premium dark cockpit UI over a WebGL canvas. */
:root {
  --bg0: #05080f;
  --ink: #eef3ff;
  --ink-dim: #aab8d4;
  --ink-faint: #7c8aaa;
  --panel: rgba(12, 18, 34, 0.72);
  --panel-line: rgba(255, 255, 255, 0.12);
  --cyan: #36e6f0;
  --violet: #a06bff;
  --amber: #ffb13d;
  --crimson: #ff5a7a;
  --emerald: #2fd07a;
}
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0; height: 100%; overflow: hidden;
  background: var(--bg0); color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
#scene { position: fixed; inset: 0; display: block; }
.bg-grad {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(1200px 900px at 16% 2%, rgba(54, 230, 240, 0.10), transparent 60%),
    radial-gradient(1300px 1000px at 88% 24%, rgba(160, 107, 255, 0.12), transparent 60%),
    radial-gradient(1200px 1000px at 50% 100%, rgba(47, 208, 122, 0.08), transparent 60%),
    linear-gradient(180deg, #05080f 0%, #070c18 50%, #05070e 100%);
}

/* ---- generic glass panel ---- */
.panel {
  background: var(--panel);
  border: 1px solid var(--panel-line);
  border-radius: 16px;
  backdrop-filter: blur(9px);
  -webkit-backdrop-filter: blur(9px);
  box-shadow: 0 24px 60px -40px rgba(0, 0, 0, 0.9);
}

/* ---- masthead ---- */
#masthead {
  position: fixed; top: 22px; left: 22px; z-index: 10;
  display: flex; align-items: center; gap: 16px; padding: 14px 20px 14px 14px;
  max-width: 540px;
}
#masthead .glyph { width: 54px; height: 54px; flex: 0 0 auto; }
#masthead h1 {
  margin: 0; font-size: 23px; font-weight: 800; letter-spacing: 0.4px; line-height: 1.05;
  background: linear-gradient(92deg, #fff, #bfe9ff 42%, #c8b3ff 72%, #ffd9a8);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
#masthead .sub { font-size: 13px; color: var(--ink-dim); margin-top: 3px; }

/* ---- top-right controls ---- */
#controls {
  position: fixed; top: 22px; right: 22px; z-index: 10;
  display: flex; flex-direction: column; gap: 10px; align-items: flex-end;
}
.btnrow { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
button.ctl {
  font: inherit; font-size: 13px; font-weight: 650; color: var(--ink);
  background: rgba(255, 255, 255, 0.06); border: 1px solid var(--panel-line);
  border-radius: 11px; padding: 9px 14px; cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.05s;
  white-space: nowrap;
}
button.ctl:hover { background: rgba(255, 255, 255, 0.13); border-color: rgba(255, 255, 255, 0.28); }
button.ctl:active { transform: translateY(1px); }
button.ctl.primary {
  background: linear-gradient(92deg, rgba(54, 230, 240, 0.30), rgba(160, 107, 255, 0.30));
  border-color: rgba(120, 180, 255, 0.6);
}
button.ctl.on { background: rgba(54, 230, 240, 0.22); border-color: rgba(54, 230, 240, 0.7); }

/* ---- plane legend (left) ---- */
#legend {
  position: fixed; left: 22px; top: 120px; z-index: 9;
  width: 232px; max-height: calc(100vh - 320px); overflow-y: auto;
  padding: 12px; display: flex; flex-direction: column; gap: 4px;
}
#legend .lh { font-size: 11px; letter-spacing: 1.4px; text-transform: uppercase; color: var(--ink-faint); margin: 2px 6px 8px; }
.legrow {
  display: flex; align-items: center; gap: 10px; padding: 7px 9px; border-radius: 9px;
  cursor: pointer; transition: background 0.12s;
}
.legrow:hover { background: rgba(255, 255, 255, 0.07); }
.legrow .swatch { width: 12px; height: 12px; border-radius: 50%; flex: 0 0 auto; box-shadow: 0 0 10px 1px currentColor; }
.legrow .ln { font-size: 13.5px; color: var(--ink); font-weight: 600; line-height: 1.1; }
.legrow .lc { font-size: 11px; color: var(--ink-faint); margin-left: auto; }

/* ---- detail panel (node click) ---- */
#detail {
  position: fixed; right: 22px; bottom: 132px; z-index: 11;
  width: 360px; padding: 18px 20px; display: none;
}
#detail.show { display: block; animation: pop 0.18s ease; }
@keyframes pop { from { opacity: 0; transform: translateY(8px) scale(0.98); } to { opacity: 1; transform: none; } }
#detail .dp { font-size: 11px; letter-spacing: 1px; text-transform: uppercase; font-weight: 700; }
#detail h3 { margin: 6px 0 8px; font-size: 21px; color: #fff; }
#detail p { margin: 0 0 12px; font-size: 14.5px; line-height: 1.5; color: var(--ink-dim); }
#detail .chips { display: flex; gap: 7px; flex-wrap: wrap; }
#detail .chip { font-size: 12px; color: var(--ink-faint); background: rgba(255, 255, 255, 0.06); border: 1px solid var(--panel-line); border-radius: 999px; padding: 3px 11px; }
#detail .gate { display: inline-block; margin-top: 10px; font-size: 12px; font-weight: 800; letter-spacing: 1px; color: #ffd0d8; background: rgba(255, 90, 122, 0.16); border: 1px solid rgba(255, 90, 122, 0.5); border-radius: 999px; padding: 4px 11px; }
#detail .close { position: absolute; top: 12px; right: 14px; cursor: pointer; color: var(--ink-faint); font-size: 18px; }
#detail .close:hover { color: #fff; }

/* ---- pipeline narration (bottom) ---- */
#pipeline {
  position: fixed; left: 50%; transform: translateX(-50%); bottom: 22px; z-index: 12;
  width: min(1180px, calc(100vw - 64px)); padding: 16px 22px;
}
#pipeline .ptop { display: flex; align-items: baseline; gap: 14px; }
#pipeline .pstage { font-size: 12px; font-weight: 800; letter-spacing: 1px; color: var(--cyan); text-transform: uppercase; }
#pipeline .ptitle { font-size: 17px; font-weight: 750; color: #fff; }
#pipeline .pdesc { font-size: 13.5px; color: var(--ink-dim); margin-top: 4px; min-height: 20px; line-height: 1.4; }
#pipeline .pbar { position: relative; height: 6px; border-radius: 6px; background: rgba(255, 255, 255, 0.08); margin-top: 12px; overflow: hidden; }
#pipeline .pfill { position: absolute; left: 0; top: 0; bottom: 0; width: 0%; border-radius: 6px;
  background: linear-gradient(90deg, var(--cyan), var(--violet), var(--amber)); transition: width 0.5s ease; }
#gatepips { display: flex; gap: 6px; margin-top: 11px; flex-wrap: wrap; }
.pip { font-size: 11px; font-weight: 700; color: var(--ink-faint);
  background: rgba(255, 255, 255, 0.05); border: 1px solid var(--panel-line);
  border-radius: 8px; padding: 4px 9px; transition: all 0.25s; }
.pip.lit { color: #062; background: rgba(47, 208, 122, 0.9); border-color: rgba(47, 208, 122, 1); box-shadow: 0 0 14px 1px rgba(47, 208, 122, 0.6); }

/* ---- tooltip ---- */
#tip {
  position: fixed; z-index: 14; pointer-events: none; display: none;
  padding: 6px 11px; font-size: 13px; font-weight: 600; color: #fff;
  background: rgba(8, 12, 24, 0.92); border: 1px solid var(--panel-line); border-radius: 9px;
  transform: translate(-50%, -140%); white-space: nowrap;
}

/* ---- hint + loader ---- */
#hint { position: fixed; left: 22px; bottom: 22px; z-index: 8; font-size: 12px; color: var(--ink-faint); }
#hint b { color: var(--ink-dim); }
#loader {
  position: fixed; inset: 0; z-index: 30; display: flex; align-items: center; justify-content: center;
  background: var(--bg0); transition: opacity 0.6s; flex-direction: column; gap: 18px;
}
#loader.gone { opacity: 0; pointer-events: none; }
#loader .ring { width: 64px; height: 64px; border-radius: 50%; border: 3px solid rgba(255, 255, 255, 0.12);
  border-top-color: var(--cyan); border-right-color: var(--violet); animation: spin 0.9s linear infinite; }
#loader .lt { font-size: 14px; color: var(--ink-dim); letter-spacing: 0.5px; }
@keyframes spin { to { transform: rotate(360deg); } }

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.14); border-radius: 8px; }

/* default: the masthead shows its full title; the short form is mobile-only */
.mast-short { display: none; }

@media (max-width: 820px) {
  /* The legend is collapsed on phones (focus planes by tapping nodes). */
  #legend { display: none; }
  #hint { display: none; } /* redundant with the masthead subtitle; frees the corner */

  /* Stack the HUD vertically so the title and the controls never overlap:
     a slim masthead pinned to the top, the controls as a wrapping row beneath. */
  #masthead {
    top: 8px; left: 8px; right: 8px; max-width: none;
    padding: 9px 12px; gap: 11px;
  }
  #masthead .glyph { width: 36px; height: 36px; }
  #masthead h1 { font-size: 18px; white-space: nowrap; }
  #masthead .sub { display: none; }
  .mast-rest { display: none; } /* "— 3D Systems Atlas" → just "M.U.S.E Atlas" */
  .mast-short { display: inline; }

  #controls {
    top: 72px; left: 8px; right: 8px; /* directly below the slim masthead */
    flex-direction: row; flex-wrap: wrap; justify-content: center; align-items: center;
    gap: 8px;
  }
  #controls .btnrow { display: contents; } /* flatten both rows into one wrapping row */
  button.ctl { font-size: 12px; padding: 7px 11px; border-radius: 10px; }

  /* Full-bleed panels with even side margins; keep them clear of each other.
     transform:none cancels the desktop translateX(-50%) centering, which would
     otherwise shift the now-full-width panel half off the left edge. */
  #detail { left: 8px; right: 8px; width: auto; bottom: 168px; }
  #pipeline { left: 8px; right: 8px; width: auto; transform: none; bottom: 8px; padding: 13px 15px; }
  #pipeline .ptitle { font-size: 15px; }
  #pipeline .pdesc { font-size: 12.5px; }
  #tip { font-size: 12px; }
}

/* Very narrow phones: shrink the control buttons a touch so 5 fit cleanly. */
@media (max-width: 380px) {
  button.ctl { font-size: 11px; padding: 6px 9px; }
  #masthead h1 { font-size: 16px; }
}