/* ═══════════════════════════════════════════════════════════════
   styles.css — Glassmorphism + Dual Theme + Portable Anim (v6)
   τ-Euler Atlas · Three.js Edition
   ═══════════════════════════════════════════════════════════════ */

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

/* ── Dark theme (default) ────────────────────────────────── */

:root {
  /* Surface */
  --glass-bg: rgba(255, 255, 255, 0.07);
  --glass-border: rgba(255, 255, 255, 0.14);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.35),
                  inset 0 1px 0 rgba(255,255,255,0.10),
                  inset 0 -1px 0 rgba(0,0,0,0.06);
  --section-bg: rgba(255, 255, 255, 0.04);
  --section-border: rgba(255, 255, 255, 0.07);
  --child-bg: rgba(255, 255, 255, 0.025);
  --child-border: rgba(255, 255, 255, 0.05);

  /* Background */
  --body-bg: #050608;
  --container-bg: radial-gradient(ellipse at 30% 20%, #0c0f2a 0%, #050608 55%),
                  radial-gradient(ellipse at 80% 85%, #0a0c1f 0%, transparent 60%);

  /* Text */
  --text-primary: rgba(255, 255, 255, 0.92);
  --text-secondary: rgba(255, 255, 255, 0.50);
  --text-dim: rgba(255, 255, 255, 0.22);

  /* Interactive Base (Shared) */
  --interact-bg: rgba(255, 255, 255, 0.04);
  --interact-border: rgba(255, 255, 255, 0.08);
  --interact-hover-bg: rgba(255, 255, 255, 0.10);
  --interact-hover-border: rgba(255, 255, 255, 0.20);
  --interact-active-bg: rgba(255, 255, 255, 0.15);
  
  /* Input tracks */
  --track-bg: rgba(255, 255, 255, 0.08);
  --track-hover: rgba(255, 255, 255, 0.12);

  /* Thumbs */
  --thumb-bg: rgba(255, 255, 255, 0.72);
  --thumb-target-bg: #89c4f4; /* Blue tint for animation target */
  --thumb-glow: 0 0 6px rgba(255,255,255,0.3);
  --thumb-hover-glow: 0 0 12px rgba(255,255,255,0.5);
  --thumb-target-glow: 0 0 10px rgba(137, 196, 244, 0.6);

  /* Accents */
  --accent-green: #a5f3c0;
  --accent-green-glow: rgba(165, 243, 192, 0.7);
  --accent-green-dim: rgba(165, 243, 192, 0.07);
  --accent-red: rgba(248, 113, 113, 0.65);
  --accent-red-dim: rgba(248, 113, 113, 0.05);

  /* Shared */
  --blur: 28px;
  --radius: 20px;
  --radius-sm: 12px;
  --font: 'DM Sans', sans-serif;
  --mono: 'DM Mono', monospace;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --trans: all 0.25s var(--ease);
}

/* ── Light theme inversion ───────────────────────────────── */
body[data-theme="light"] #app-root { filter: invert(1) hue-rotate(180deg); }
#app-root { position: fixed; inset: 0; }

body {
  overflow: hidden; background: var(--body-bg); font-family: var(--font);
  color: var(--text-primary); user-select: none; -webkit-user-select: none;
}

#container { position: fixed; inset: 0; background: var(--container-bg); }

/* ── DRY interactive base ────────────────────────────────── */

.ctrl-interactive {
  cursor: pointer; outline: none; transition: var(--trans);
  background: var(--interact-bg); border: 1px solid var(--interact-border);
  color: var(--text-secondary);
}

.ctrl-interactive:hover:not(.active) {
  background: var(--interact-hover-bg); border-color: var(--interact-hover-border);
  color: var(--text-primary); transform: translateY(-1px);
}

.ctrl-interactive.active {
  background: var(--interact-active-bg); border-color: var(--interact-hover-border);
  color: var(--text-primary);
}

/* ── Controls panel ──────────────────────────────────────── */

#controls-panel {
  position: fixed; top: 20px; right: 20px; bottom: 20px;
  width: 310px; z-index: 100;
  overflow-y: auto; overflow-x: hidden; padding: 4px;
  scrollbar-width: thin; scrollbar-color: var(--track-bg) transparent;
  transition: var(--trans);
}

.collapse-btn {
  display: flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; border-radius: 50%;
  font-size: 11px; margin-left: auto; margin-bottom: 6px;
}
.collapse-btn:hover { transform: rotate(90deg); }

/* ── Accordion Panels (Replaces ctrl-section / child) ────── */

.accordion-panel {
  background: var(--section-bg); border: 1px solid var(--section-border);
  backdrop-filter: blur(16px) saturate(160%); -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 2px 12px rgba(0,0,0,0.10); border-radius: var(--radius-sm);
  margin-bottom: 10px; overflow: hidden; transition: box-shadow 0.3s var(--ease);
}
.accordion-panel:hover { box-shadow: 0 4px 18px rgba(0,0,0,0.16); }

.accordion-header {
  font-size: 10px; letter-spacing: 0.10em; text-transform: uppercase;
  color: var(--text-secondary); font-weight: 500;
  padding: 11px 14px 9px; cursor: pointer; transition: var(--trans);
  display: flex; align-items: center; justify-content: space-between;
  border-left: 2px solid transparent;
}
.accordion-header:not(.collapsed) { border-left-color: var(--accent-green); color: var(--text-primary); }
.accordion-header::after { content: '▾'; font-size: 14px; opacity: 0.7; transition: transform 0.3s; flex-shrink: 0; }
.accordion-header.collapsed::after { transform: rotate(-90deg); }

.accordion-body {
  padding: 4px 14px 12px; transition: max-height 0.35s var(--ease), opacity 0.3s, padding 0.3s;
  max-height: 1200px; opacity: 1;
}
.accordion-body.collapsed { max-height: 0; opacity: 0; padding-top: 0; padding-bottom: 0; overflow: hidden; }

/* Sub-panels */
.accordion-child-panel { margin: 6px 0 8px; background: var(--child-bg); border: 1px solid var(--child-border); border-radius: 8px; overflow: hidden; }
.accordion-child-header { font-size: 9px; letter-spacing: 0.06em; color: var(--text-dim); padding: 6px 10px; cursor: pointer; display: flex; justify-content: space-between; align-items: center; font-family: var(--mono); }
.accordion-child-header::after { content: '▸'; font-size: 11px; opacity: 0.7; transition: var(--trans); flex-shrink: 0; }
.accordion-child-header:not(.collapsed)::after { transform: rotate(90deg); }
.accordion-child-body { padding: 2px 10px 6px; transition: var(--trans); max-height: 600px; opacity: 1; }
.accordion-child-body.collapsed { max-height: 0; opacity: 0; padding: 0 10px; overflow: hidden; }


/* ── Dual-Thumb Interactive Sliders ──────────────────────── */

.slider-row { display: flex; align-items: center; gap: 6px; margin-bottom: 7px; }
.slider-label { color: var(--text-secondary); font-size: 10px; width: 75px; flex-shrink: 0; font-family: var(--mono); }
.slider-value { color: var(--text-dim); font-size: 9px; font-family: var(--mono); width: 65px; text-align: right; flex-shrink: 0; }

.link-toggle {
  background: none; border: none; font-size: 12px; color: var(--text-dim);
  cursor: pointer; padding: 0; outline: none; transition: var(--trans);
  display: flex; align-items: center; justify-content: center;
  width: 16px; height: 16px; flex-shrink: 0;
}
.link-toggle.active { color: var(--accent-green); text-shadow: 0 0 5px var(--accent-green-glow); }
.link-toggle:hover { color: var(--text-primary); }

.slider-track-wrap {
  flex: 1; height: 14px; position: relative; display: flex; align-items: center;
}
.slider-track-wrap::before {
  content: ''; position: absolute; left: 0; right: 0; top: 50%; height: 4px;
  transform: translateY(-50%); background: var(--track-bg); border-radius: 2px;
}
.slider-track-wrap:hover::before { background: var(--track-hover); }

.slider-input {
  position: absolute; width: 100%; top: 50%; transform: translateY(-50%);
  -webkit-appearance: none; appearance: none; background: transparent; outline: none; pointer-events: none;
}

.slider-input::-webkit-slider-thumb {
  -webkit-appearance: none; width: 12px; height: 12px; border-radius: 50%;
  cursor: pointer; pointer-events: auto; transition: transform 0.15s, box-shadow 0.15s;
}
.base-thumb::-webkit-slider-thumb {
  background: var(--thumb-bg); box-shadow: var(--thumb-glow); z-index: 2;
}
.target-thumb::-webkit-slider-thumb {
  background: var(--thumb-target-bg); box-shadow: var(--thumb-target-glow); width: 10px; height: 10px; z-index: 1; border: 2px solid var(--body-bg);
}

.slider-input::-webkit-slider-thumb:hover { transform: scale(1.35); box-shadow: var(--thumb-hover-glow); }
.slider-input:active::-webkit-slider-thumb { transform: scale(1.2); }

.hidden { display: none !important; }

/* ── Mode toggles & pills ────────────────────────────────── */

.mode-toggle-row { display: flex; align-items: center; gap: 6px; margin-bottom: 5px; }
.mode-label { color: var(--text-secondary); font-size: 10px; width: 50px; flex-shrink: 0; font-weight: 500; }
.toggle-group-inline { display: flex; gap: 4px; flex-wrap: wrap; margin-bottom: 4px;}

.toggle-pill {
  display: flex; align-items: center; gap: 7px;
  padding: 6px 12px; border-radius: 50px; font-size: 11px; font-weight: 500;
}
.toggle-pill .pill-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--text-dim); transition: var(--trans); flex-shrink: 0; }
.toggle-pill.active .pill-dot { background: var(--accent-green); box-shadow: 0 0 8px var(--accent-green-glow); }

/* Parent toggle buttons (All On/All Off) */
.parent-toggle-row { display: flex; gap: 5px; margin-bottom: 8px; }
.parent-toggle-btn {
  flex: 1; padding: 6px 0; border-radius: 6px; font-size: 9px; font-weight: 600; font-family: var(--mono); text-transform: uppercase;
}
.parent-toggle-btn.on.active, .parent-toggle-btn.on:hover { background: var(--accent-green-dim); border-color: var(--accent-green); color: var(--accent-green); }
.parent-toggle-btn.off.active, .parent-toggle-btn.off:hover { background: var(--accent-red-dim); border-color: var(--accent-red); color: var(--accent-red); }

/* ── Presets ─────────────────────────────────────────────── */

.preset-row { display: flex; gap: 4px; flex-wrap: wrap; }
.preset-btn { padding: 5px 10px; border-radius: 8px; font-size: 10px; font-weight: 400; }

/* ── Info text ───────────────────────────────────────────── */

.ctrl-info { color: var(--text-dim); font-size: 9px; font-family: var(--mono); line-height: 1.5; margin-top: 4px; }
.arch-info { line-height: 1.7; }
.arch-info sup, .arch-info sub { font-size: 8px; }
.arch-spacer { height: 4px; }

.dim-dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; transition: opacity 0.25s; box-shadow: 0 0 6px currentColor; }

/* ── HUD and Transport ───────────────────────────────────── */

#hud {
  position: fixed; top: 20px; left: 20px;
  padding: 14px 18px; z-index: 100; min-width: 210px;
  transition: var(--trans);
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  backdrop-filter: blur(var(--blur)) saturate(180%); border-radius: var(--radius);
  box-shadow: var(--glass-shadow);
}
.hud-title { font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-secondary); margin-bottom: 10px; font-weight: 500; display: flex; gap: 6px; }
.hud-row { display: flex; justify-content: space-between; align-items: center; padding: 5px 0; border-bottom: 1px solid rgba(255,255,255,0.05); }
.hud-row:last-child { border-bottom: none; }
.hud-key { color: var(--text-secondary); font-size: 11.5px; }
.hud-val { font-family: var(--mono); font-size: 11px; font-weight: 300; }

.status-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent-green); animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; box-shadow: 0 0 8px var(--accent-green-glow); } 50% { opacity: 0.45; } }

body[data-collapsed="true"] #hud { opacity: 0; pointer-events: none; transform: translateX(-100%); }
body[data-collapsed="true"] #controls-panel { opacity: 0; pointer-events: none; transform: translateX(100%); }

#transport-bar {
  position: fixed; bottom: 16px; left: 50%;
  transform: translateX(-50%); z-index: 200;
  padding: 6px 14px; display: flex; align-items: center; gap: 8px;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  backdrop-filter: blur(var(--blur)) saturate(180%);
  border-radius: 50px; box-shadow: 0 10px 40px rgba(0,0,0,0.5);
  transition: var(--trans);
}

.transport-btn-mini {
  width: 28px; height: 28px; border-radius: 50%; font-size: 12px;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.transport-gear {
  width: 28px; height: 28px; border-radius: 50%; font-size: 14px;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.transport-gear:hover { transform: rotate(60deg); }
.transport-scrub { width: 200px; }

@media (max-width: 768px) {
  #controls-panel { width: 260px; top: 10px; right: 10px; bottom: 10px; }
  #hud { top: 10px; left: 10px; min-width: 160px; }
  .slider-label { width: 60px; }
  .transport-scrub { width: 120px; }
}

/* ── Mode pills (derived / manual / direct toggles) ─────── */

.mode-row {
  display: flex; align-items: center; gap: 4px;
  padding: 4px 0 2px; flex-wrap: wrap;
}

.mode-pill {
  flex: 1; min-width: 0;
  padding: 3px 6px; border-radius: 20px;
  font-size: 9.5px; font-family: 'DM Mono', monospace; letter-spacing: 0.02em;
  background: var(--interact-bg); border: 1px solid var(--interact-border);
  color: var(--text-secondary); cursor: pointer;
  transition: var(--trans); white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.mode-pill:hover {
  background: var(--interact-hover-bg); border-color: var(--interact-hover-border);
  color: var(--text-primary);
}
.mode-pill.active {
  background: rgba(137, 196, 244, 0.18);
  border-color: rgba(137, 196, 244, 0.5);
  color: #89c4f4;
  box-shadow: 0 0 8px rgba(137, 196, 244, 0.2);
}

/* ── Per-member size (s_) slider row — subordinate indent ───── */

/* ── Per-member size (s_) slider row — subordinate indent ───── */

.sz-row {
  opacity: 0.65;
  margin-top: -2px;   /* tuck under opacity row */
}
.sz-row .slider-label {
  font-size: 9px;
  color: var(--text-dim);
  padding-left: 10px;
}
.sz-row .slider-track-wrap {
  height: 14px;
}