/* ============================================================
   Aether Field — styles.css
   Sections: Reset & tokens · Background layers · Canvas ·
             Glass panel · Controls · Responsive
   ============================================================ */

/* ---------- Reset & design tokens ---------- */
:root {
  --bg-0: #04050b;
  --bg-1: #070a18;
  --navy: #0b1230;
  --cyan: #1be3ff;
  --violet: #6a2bff;
  --magenta: #ff2bd0;
  --amber: #ffb24d;
  --ink: #eaf1ff;
  --ink-dim: rgba(234, 241, 255, 0.55);
  --glass: rgba(16, 22, 44, 0.42);
  --glass-brd: rgba(140, 170, 255, 0.16);
  --glass-hi: rgba(255, 255, 255, 0.06);
  --shadow: 0 24px 70px -20px rgba(0, 0, 0, 0.75);
  --radius: 18px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

/* The hidden attribute must always win, even over display:flex rules. */
[hidden] { display: none !important; }

html, body { height: 100%; }

/* Visible focus ring for keyboard users (mouse clicks don't trigger it). */
:focus-visible {
  outline: 2px solid rgba(120, 160, 255, 0.85);
  outline-offset: 2px;
}

body {
  font-family: "Inter", "Helvetica Neue", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background: var(--bg-0);
  color: var(--ink);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  cursor: crosshair;
}

/* ---------- Background layers (cinematic depth) ---------- */
.bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

/* Deep layered gradient instead of flat black */
.bg-gradient {
  background:
    radial-gradient(140% 120% at 50% 8%, #0a1338 0%, transparent 55%),
    radial-gradient(120% 100% at 12% 100%, #160a2e 0%, transparent 60%),
    radial-gradient(120% 100% at 88% 90%, #06182b 0%, transparent 55%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-0) 100%);
}

/* Subtle radial glow that slowly breathes */
.bg-glow {
  background: radial-gradient(
    closest-side at 50% 50%,
    rgba(60, 110, 255, 0.16) 0%,
    rgba(110, 43, 255, 0.08) 38%,
    transparent 72%
  );
  animation: breathe 12s var(--ease) infinite;
  mix-blend-mode: screen;
}

@keyframes breathe {
  0%, 100% { transform: scale(1); opacity: 0.85; }
  50%      { transform: scale(1.12); opacity: 1; }
}

/* Faint animated film grain via SVG fractal noise */
.bg-grain {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 180px 180px;
  opacity: 0.05;
  mix-blend-mode: overlay;
  animation: grain 1.2s steps(6) infinite;
}

@keyframes grain {
  0%   { transform: translate(0, 0); }
  20%  { transform: translate(-6%, 4%); }
  40%  { transform: translate(4%, -6%); }
  60%  { transform: translate(-3%, 5%); }
  80%  { transform: translate(6%, -3%); }
  100% { transform: translate(0, 0); }
}

/* Soft vignette around the edges */
.bg-vignette {
  background: radial-gradient(120% 120% at 50% 50%, transparent 58%, rgba(0, 0, 0, 0.66) 100%);
}

/* Grain + vignette sit ABOVE the canvas (z=1) so they grade the final
   rendered image; the gradient + glow stay below and show through the
   canvas's transparent regions. */
.bg-grain,
.bg-vignette { z-index: 2; }

/* ---------- Canvas ---------- */
#field {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  display: block;
  touch-action: none;
}

/* ---------- Glass control panel ---------- */
.panel {
  position: fixed;
  top: 22px;
  left: 22px;
  z-index: 10;
  width: 312px;
  max-width: calc(100vw - 44px);
  /* Never taller than the viewport: the body scrolls instead of overflowing. */
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 44px);
  max-height: calc(100dvh - 44px);
  padding: 20px 20px 14px;
  border-radius: var(--radius);
  background: var(--glass);
  border: 1px solid var(--glass-brd);
  box-shadow: var(--shadow), inset 0 1px 0 var(--glass-hi);
  -webkit-backdrop-filter: blur(22px) saturate(150%);
  backdrop-filter: blur(22px) saturate(150%);
  /* No fill-mode: a filled animation would otherwise sit above the
     cascade and keep overriding `.is-hidden { opacity: 0 }`. */
  animation: rise 0.9s var(--ease);
}

@keyframes rise {
  from { opacity: 0; transform: translateY(-14px); }
  to   { opacity: 1; transform: translateY(0); }
}

.panel-head { margin-bottom: 16px; flex: 0 0 auto; }

.head-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.head-actions { display: flex; gap: 6px; }

.icon-btn {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--glass-brd);
  border-radius: 8px;
  background: rgba(10, 16, 36, 0.55);
  color: var(--ink-dim);
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}
.icon-btn:hover { color: var(--ink); background: rgba(24, 34, 70, 0.7); border-color: rgba(140, 170, 255, 0.32); }

.title {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: linear-gradient(92deg, var(--cyan), #b9c6ff 45%, var(--magenta));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.subtitle {
  margin-top: 5px;
  font-size: 12px;
  line-height: 1.45;
  color: var(--ink-dim);
  letter-spacing: 0.02em;
}

.panel-body {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 0;             /* allow this flex child to shrink and scroll */
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(140, 170, 255, 0.3) transparent;
}
.panel-body::-webkit-scrollbar,
.queue::-webkit-scrollbar { width: 6px; }
.panel-body::-webkit-scrollbar-thumb,
.queue::-webkit-scrollbar-thumb {
  background: rgba(140, 170, 255, 0.28);
  border-radius: 6px;
}
.panel-body::-webkit-scrollbar-track,
.queue::-webkit-scrollbar-track { background: transparent; }

/* Segmented controls (mode + density) */
.seg {
  display: flex;
  gap: 4px;
  padding: 4px;
  border-radius: 12px;
  background: rgba(6, 10, 24, 0.5);
  border: 1px solid var(--glass-brd);
}

.seg-btn {
  flex: 1;
  padding: 9px 6px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--ink-dim);
  font: inherit;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: color 0.25s var(--ease), background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.seg-btn:hover { color: var(--ink); }

.seg-btn.is-active {
  color: #fff;
  background: linear-gradient(180deg, rgba(80, 130, 255, 0.32), rgba(110, 43, 255, 0.24));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.14), 0 6px 18px -8px rgba(60, 110, 255, 0.7);
}

.seg-sm .seg-btn { padding: 8px 4px; font-size: 12px; }

/* Groups & rows */
.group { display: flex; flex-direction: column; gap: 12px; }
.row { display: flex; gap: 10px; align-items: stretch; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border: 1px solid var(--glass-brd);
  border-radius: 11px;
  background: rgba(10, 16, 36, 0.55);
  color: var(--ink);
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 11px 14px;
  cursor: pointer;
  transition: transform 0.15s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.btn:hover { background: rgba(24, 34, 70, 0.7); border-color: rgba(140, 170, 255, 0.32); }
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-ghost { flex: 1; width: 100%; }
.ic { font-size: 13px; line-height: 1; }

.btn-play {
  width: 48px;
  padding: 0;
  background: linear-gradient(180deg, rgba(80, 130, 255, 0.4), rgba(110, 43, 255, 0.3));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18), 0 8px 22px -10px rgba(70, 110, 255, 0.8);
}
.btn-play:hover { background: linear-gradient(180deg, rgba(100, 150, 255, 0.55), rgba(130, 60, 255, 0.4)); }

/* Transport row: prev / play / next */
.transport { align-items: center; justify-content: center; gap: 10px; }
.btn-mini {
  width: 44px;
  padding: 0;
  font-size: 14px;
}

.track {
  font-size: 11.5px;
  color: var(--ink-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Seek / time bar */
.seek-row { display: flex; align-items: center; gap: 9px; }
.seek-row #seek { flex: 1; }
.time {
  font-size: 10.5px;
  letter-spacing: 0.02em;
  color: var(--ink-dim);
  font-variant-numeric: tabular-nums;
  min-width: 30px;
}
.time:last-child { text-align: right; }

/* Playback queue */
.queue {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 150px;
  overflow-y: auto;
  margin: 0;
  padding: 0;
}
.queue:empty { display: none; }
.queue li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 9px;
  border-radius: 9px;
  background: rgba(6, 10, 24, 0.5);
  border: 1px solid transparent;
  font-size: 11.5px;
  color: var(--ink-dim);
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.queue li:hover { color: var(--ink); border-color: var(--glass-brd); }
.queue li.is-current {
  color: #fff;
  background: linear-gradient(180deg, rgba(80, 130, 255, 0.30), rgba(110, 43, 255, 0.22));
  border-color: rgba(140, 170, 255, 0.28);
}
.queue .q-index { font-variant-numeric: tabular-nums; opacity: 0.6; min-width: 14px; }
.queue .q-name { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.queue .q-remove {
  border: 0;
  background: transparent;
  color: inherit;
  opacity: 0.55;
  font: inherit;
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  padding: 0 2px;
}
.queue .q-remove:hover { opacity: 1; color: var(--magenta); }
/* Drag-and-drop reordering */
.queue li { cursor: grab; }
.queue li.is-dragging { opacity: 0.45; cursor: grabbing; }
.queue li.is-drop-target {
  border-color: var(--cyan);
  box-shadow: inset 0 2px 0 -1px var(--cyan);
}

/* System-audio explanatory note */
.note {
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--ink-dim);
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(110, 43, 255, 0.1);
  border: 1px solid rgba(140, 120, 255, 0.22);
}
.note strong { color: var(--ink); font-weight: 600; }

/* Hint line + keycaps */
.hint {
  font-size: 11px;
  line-height: 1.5;
  color: var(--ink-dim);
  letter-spacing: 0.02em;
}
.hint kbd {
  font-family: inherit;
  font-size: 10.5px;
  padding: 1px 5px;
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--glass-brd);
  color: var(--ink);
}

/* Field + labels + sliders */
.field { display: flex; flex-direction: column; gap: 9px; }

.lbl {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

/* Unfilled track by default; the JS paints the cyan→violet fill up to the
   current value (otherwise every slider reads as "100%" no matter its value). */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.12);
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #f3f7ff;
  border: 2px solid rgba(120, 160, 255, 0.9);
  box-shadow: 0 0 12px rgba(80, 140, 255, 0.9), 0 2px 6px rgba(0, 0, 0, 0.5);
  transition: transform 0.12s var(--ease);
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.18); }

input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #f3f7ff;
  border: 2px solid rgba(120, 160, 255, 0.9);
  box-shadow: 0 0 12px rgba(80, 140, 255, 0.9);
}

/* Secondary label qualifier (e.g. "camera · plays alongside audio") */
.lbl-sub {
  text-transform: none;
  letter-spacing: 0.02em;
  font-weight: 400;
  font-size: 10px;
  color: var(--ink-dim);
  opacity: 0.75;
  margin-left: 6px;
}

/* ---------- Developer panel (top-right tuning dials) ---------- */
/* Small launcher button — reuses .restore-btn dimensions, pinned top-right
   and visible by default (unlike .restore-btn which starts hidden). */
.restore-btn.dev-open {
  left: auto;
  right: 22px;
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.restore-btn.dev-open.is-hidden {
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
}

.dev-panel {
  position: fixed;
  top: 22px;
  right: 22px;
  z-index: 10;
  width: 232px;
  max-width: calc(100vw - 44px);
  max-height: calc(100dvh - 44px);
  overflow-y: auto;
  padding: 14px 16px 16px;
  border-radius: var(--radius);
  background: var(--glass);
  border: 1px solid var(--glass-brd);
  box-shadow: var(--shadow), inset 0 1px 0 var(--glass-hi);
  -webkit-backdrop-filter: blur(22px) saturate(150%);
  backdrop-filter: blur(22px) saturate(150%);
  animation: rise 0.3s var(--ease);
  display: none;          /* hidden until launched */
}
.dev-panel.is-open { display: block; }

.dev-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.dev-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0;
}

.dev-toggle {
  font-size: 15px;
  line-height: 1;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.dev-body { display: flex; flex-direction: column; gap: 14px; }
.dev-body .lbl-sub { color: var(--cyan); opacity: 0.9; font-variant-numeric: tabular-nums; }
/* Tighter type so "X/Y/Both/None" fit the narrow dev panel. */
.dev-axis .seg-btn { font-size: 9.5px; padding: 7px 2px; letter-spacing: 0.01em; }

/* Size-dial header row: label on the left, "Adaptive" toggle on the right. */
.dev-body .field-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.adaptive-btn {
  flex: none;
  border: 1px solid var(--glass-brd);
  background: rgba(6, 10, 24, 0.5);
  color: var(--ink-dim);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}
.adaptive-btn:hover { color: var(--ink); border-color: rgba(140, 170, 255, 0.4); }
.adaptive-btn.is-active {
  color: #fff;
  background: linear-gradient(180deg, rgba(80, 130, 255, 0.5), rgba(110, 43, 255, 0.4));
  border-color: rgba(140, 170, 255, 0.6);
}
/* While Adaptive is on the dial is locked — dim it and ignore pointer input. */
.field.is-adaptive input[type="range"] { opacity: 0.35; pointer-events: none; }

/* Hand-control camera preview */
.hand-preview {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  margin-top: 2px;
  border-radius: 10px;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid var(--glass-brd);
  box-shadow: inset 0 1px 0 var(--glass-hi);
}
.hand-preview[hidden] { display: none; }
.hand-preview video,
.hand-preview canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scaleX(-1); /* mirror so it reads like a looking glass */
}
.hand-preview canvas { pointer-events: none; }
.hand-status {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 6px 9px;
  font-size: 10.5px;
  line-height: 1.3;
  color: var(--ink);
  background: linear-gradient(0deg, rgba(4, 5, 11, 0.78), rgba(4, 5, 11, 0));
}

/* Copyright notice toggle */
/* Small inline "!" badge sitting at the end of the tagline. */
.btn-copyright {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 15px;
  height: 15px;
  padding: 0;
  margin-left: 6px;
  vertical-align: middle;
  border: 1px solid rgba(255, 178, 77, 0.45);
  border-radius: 50%;
  background: rgba(255, 178, 77, 0.10);
  color: var(--amber);
  font: inherit;
  font-size: 10px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}
.btn-copyright:hover {
  background: rgba(255, 178, 77, 0.2);
  border-color: rgba(255, 178, 77, 0.6);
}

.copyright-notice {
  font-size: 11px;
  line-height: 1.55;
  color: var(--ink-dim);
  margin-top: 10px;
  padding: 9px 11px;
  border-radius: 9px;
  background: rgba(255, 178, 77, 0.06);
  border: 1px solid rgba(255, 178, 77, 0.18);
}
.copyright-notice[hidden] { display: none; }
.copyright-notice p { margin-bottom: 6px; color: var(--ink); font-weight: 500; }

.copyright-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.copyright-list li {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 10.5px;
  flex-wrap: wrap;
}
.copyright-list span { color: var(--ink); }
.copyright-list a {
  color: var(--cyan);
  text-decoration: none;
  white-space: nowrap;
}
.copyright-list a:hover { text-decoration: underline; }

/* Gesture legend (shown while hand control is on) */
.hand-gestures {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 10px;
  margin: 8px 0 0;
  padding: 0;
  font-size: 10.5px;
  line-height: 1.3;
  color: var(--ink-dim);
}
.hand-gestures[hidden] { display: none; }
.hand-gestures b { color: var(--ink); font-weight: 600; }

/* Footer / status */
.panel-foot {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 16px;
  padding-top: 13px;
  border-top: 1px solid var(--glass-brd);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink-dim);
  box-shadow: 0 0 8px currentColor;
  transition: background 0.4s var(--ease), color 0.4s var(--ease);
}
.status-dot.is-playing   { background: var(--cyan);    color: var(--cyan); animation: dotPulse 1.8s var(--ease) infinite; }
.status-dot.is-listening { background: var(--amber);   color: var(--amber); animation: dotPulse 1.8s var(--ease) infinite; }
.status-dot.is-blocked   { background: var(--magenta); color: var(--magenta); }

@keyframes dotPulse {
  0%, 100% { box-shadow: 0 0 6px currentColor; }
  50%      { box-shadow: 0 0 16px currentColor; }
}

.status {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

/* ---------- Hide / restore panel ---------- */
.panel {
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}
.panel.is-hidden {
  opacity: 0;
  transform: translateX(-24px) scale(0.97);
  pointer-events: none;
}

.restore-btn {
  position: fixed;
  top: 22px;
  left: 22px;
  z-index: 11;
  padding: 10px 16px;
  border-radius: 11px;
  border: 1px solid var(--glass-brd);
  background: var(--glass);
  color: var(--ink);
  font: inherit;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  cursor: pointer;
  -webkit-backdrop-filter: blur(22px) saturate(150%);
  backdrop-filter: blur(22px) saturate(150%);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}
.restore-btn.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.restore-btn:hover { background: rgba(24, 34, 70, 0.7); border-color: rgba(140, 170, 255, 0.32); }

/* ---------- Responsive ---------- */
@media (max-width: 560px) {
  .panel {
    top: auto;
    bottom: 14px;
    left: 14px;
    right: 14px;
    width: auto;
    max-width: none;
    /* Bottom-pinned: cap height so the field stays visible above the panel. */
    max-height: 62vh;
    max-height: 62dvh;
    padding: 15px 15px 11px;
    border-radius: 16px;
  }
  .panel-head { margin-bottom: 12px; }
  .title { font-size: 17px; }
  .panel-body { gap: 12px; }
  .panel-foot { margin-top: 12px; padding-top: 10px; }
}

@media (max-width: 360px) {
  .subtitle { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .bg-glow, .bg-grain, .panel, .status-dot { animation: none; }
}