/* =============================================================
   ParticleDisplay — Cyberpunk HUD Theme
   ============================================================= */

:root {
  --bg-0: #02050a;
  --bg-1: #050a14;
  --bg-2: #0a1220;
  --line: rgba(0, 255, 234, 0.12);
  --line-strong: rgba(0, 255, 234, 0.45);
  --neon: #00ffea;
  --neon-soft: #66ffe6;
  --warn: #ff4f81;
  --gold: #ffd166;
  --text: #d6f8ff;
  --text-dim: #6f8c9b;
  --text-faint: #3a5666;
  --panel-bg: rgba(5, 10, 20, 0.78);
  --panel-bg-solid: #060c16;
  --shadow: 0 12px 60px rgba(0, 255, 234, 0.06);
  --mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;
  --sans: 'Inter', 'Helvetica Neue', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  width: 100%;
  background: var(--bg-0);
  color: var(--text);
  font-family: var(--sans);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  /* Soft scanline / grid backdrop behind the canvas */
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 50% 30%, rgba(0,255,234,0.06), transparent 60%),
    linear-gradient(transparent 0 95%, rgba(0,255,234,0.04) 95% 100%) 0 0 / 100% 4px,
    linear-gradient(90deg, transparent 0 95%, rgba(0,255,234,0.04) 95% 100%) 0 0 / 4px 100%;
  z-index: 1;
}

#scene {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
  z-index: 0;
}

/* ============================================================= */
/* BOOT SCREEN                                                    */
/* ============================================================= */
.boot-screen {
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at center, var(--bg-1) 0%, var(--bg-0) 70%);
  z-index: 9999;
  display: grid;
  place-items: center;
  transition: opacity 600ms ease, visibility 600ms ease;
}
.boot-screen.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.boot-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  animation: gridDrift 12s linear infinite;
}
@keyframes gridDrift { to { background-position: 40px 40px, 40px 40px; } }

.boot-content {
  position: relative;
  width: min(420px, 90vw);
  padding: 28px 32px;
  border: 1px solid var(--line-strong);
  background: var(--panel-bg);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow), inset 0 0 0 1px rgba(255,255,255,0.02);
}
.boot-content::before, .boot-content::after {
  content: '';
  position: absolute;
  width: 14px; height: 14px;
  border: 1px solid var(--neon);
}
.boot-content::before { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.boot-content::after  { bottom: -1px; right: -1px; border-left: none; border-top: none; }

.boot-logo {
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--text);
}
.boot-logo .accent { color: var(--neon); margin-left: 4px; }
.boot-version {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--text-dim);
  margin-top: 4px;
  margin-bottom: 24px;
}
.boot-progress { margin-bottom: 18px; }
.boot-progress-bar {
  height: 4px;
  width: 100%;
  background: rgba(0,255,234,0.08);
  overflow: hidden;
  position: relative;
}
.boot-progress-fill {
  position: absolute; inset: 0 100% 0 0;
  background: linear-gradient(90deg, var(--neon), var(--neon-soft));
  box-shadow: 0 0 12px var(--neon);
  transition: right 200ms ease;
}
.boot-status {
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--neon);
  letter-spacing: 0.18em;
}
.boot-meta {
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--text-dim);
  padding: 6px 0;
  border-top: 1px solid var(--line);
}
.boot-meta .ok { color: var(--neon); }

/* ============================================================= */
/* HUD — TOP BAR                                                  */
/* ============================================================= */
.hud-top {
  position: fixed;
  top: 14px; left: 14px; right: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  z-index: 50;
  pointer-events: none;
}
.hud-top > div { pointer-events: auto; }
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--panel-bg);
  border: 1px solid var(--line-strong);
  padding: 8px 14px;
  font-family: var(--mono);
  letter-spacing: 0.18em;
  font-size: 12px;
  color: var(--text);
  backdrop-filter: blur(8px);
}
.brand-mark { color: var(--neon); font-size: 14px; }
.brand-version { color: var(--text-dim); font-size: 10px; padding-left: 6px; }
.status-pill {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--neon);
  border: 1px solid var(--line-strong);
  background: var(--panel-bg);
  padding: 7px 14px;
  backdrop-filter: blur(8px);
  position: relative;
}
.status-pill::before {
  content: '';
  display: inline-block;
  width: 6px; height: 6px;
  background: var(--neon);
  margin-right: 8px;
  vertical-align: middle;
  box-shadow: 0 0 10px var(--neon);
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.4} }
.hud-right { display: flex; gap: 8px; }
.hud-btn {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--text-dim);
  background: var(--panel-bg);
  border: 1px solid var(--line-strong);
  padding: 7px 12px;
  cursor: pointer;
  backdrop-filter: blur(8px);
  transition: color .2s, border-color .2s, background .2s;
}
.hud-btn:hover { color: var(--neon); border-color: var(--neon); }

/* ============================================================= */
/* PANELS                                                         */
/* ============================================================= */
.panel {
  position: fixed;
  top: 70px;
  width: 320px;
  max-height: calc(100vh - 130px);
  overflow-y: auto;
  background: var(--panel-bg);
  border: 1px solid var(--line-strong);
  backdrop-filter: blur(10px);
  z-index: 40;
  font-family: var(--sans);
  scrollbar-width: thin;
  scrollbar-color: var(--neon) transparent;
}
.panel::-webkit-scrollbar { width: 6px; }
.panel::-webkit-scrollbar-thumb { background: var(--line-strong); }
.panel-left  { left: 14px; }
.panel-right { right: 14px; width: 280px; }
.panel.collapsed { max-height: 44px; overflow: hidden; }

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--neon);
  position: sticky;
  top: 0;
  background: var(--panel-bg-solid);
  z-index: 1;
}
.panel-title::before { content: '◢ '; color: var(--neon); }
.panel-collapse {
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--neon);
  width: 22px; height: 22px;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
}
.panel-section {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}
.panel-section-title {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--text-dim);
  margin-bottom: 10px;
}
.panel-footer {
  padding: 14px 16px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--text-dim);
  text-align: center;
}
.panel-footer a { color: var(--neon); text-decoration: none; }
.heart { color: var(--warn); }

/* ============================================================= */
/* CONTROLS                                                       */
/* ============================================================= */
.ctrl {
  display: block;
  margin-bottom: 12px;
}
.ctrl-label {
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--text);
  text-transform: uppercase;
  margin-bottom: 6px;
}
.ctrl-label em {
  color: var(--neon);
  font-style: normal;
  letter-spacing: 0.1em;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: rgba(0,255,234,0.12);
  outline: none;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  background: var(--neon);
  border: 2px solid var(--bg-0);
  cursor: pointer;
  box-shadow: 0 0 8px var(--neon);
}
input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px;
  background: var(--neon);
  border: 2px solid var(--bg-0);
  box-shadow: 0 0 8px var(--neon);
  cursor: pointer;
}

select, input[type="text"] {
  width: 100%;
  background: var(--bg-1);
  border: 1px solid var(--line-strong);
  color: var(--text);
  font-family: var(--mono);
  font-size: 12px;
  padding: 8px 10px;
  letter-spacing: 0.06em;
  outline: none;
}
select:focus, input[type="text"]:focus { border-color: var(--neon); }

.text-field { margin-bottom: 10px; }

/* Toggle */
.ctrl-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}
.ctrl-toggle input { display: none; }
.toggle-track {
  width: 36px; height: 18px;
  background: rgba(0,255,234,0.1);
  border: 1px solid var(--line-strong);
  position: relative;
  transition: background .2s;
}
.toggle-thumb {
  position: absolute;
  top: 2px; left: 2px;
  width: 12px; height: 12px;
  background: var(--text-dim);
  transition: left .2s, background .2s;
}
.ctrl-toggle input:checked ~ .toggle-track { background: rgba(0,255,234,0.25); }
.ctrl-toggle input:checked ~ .toggle-track .toggle-thumb {
  left: 20px; background: var(--neon); box-shadow: 0 0 8px var(--neon);
}

/* Segment row */
.seg-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
  gap: 4px;
  margin-bottom: 8px;
}
.seg-btn {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  background: var(--bg-1);
  border: 1px solid var(--line);
  padding: 8px 4px;
  cursor: pointer;
  transition: all .2s;
}
.seg-btn:hover { color: var(--neon); border-color: var(--line-strong); }
.seg-btn.active {
  color: var(--bg-0);
  background: var(--neon);
  border-color: var(--neon);
  box-shadow: 0 0 12px rgba(0,255,234,0.4);
}

/* Buttons */
.primary-btn {
  width: 100%;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--bg-0);
  background: var(--neon);
  border: none;
  padding: 10px 12px;
  cursor: pointer;
  margin-top: 8px;
  transition: filter .2s, transform .1s;
  position: relative;
}
.primary-btn:hover { filter: brightness(1.15); }
.primary-btn:active { transform: translateY(1px); }
.ghost-btn {
  width: 100%;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--neon);
  background: transparent;
  border: 1px solid var(--line-strong);
  padding: 9px 12px;
  cursor: pointer;
  transition: all .2s;
}
.ghost-btn:hover { background: rgba(0,255,234,0.08); }

.hint {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-faint);
  margin-top: 6px;
  letter-spacing: 0.06em;
}

/* Upload row */
.upload-row {
  display: flex;
  align-items: stretch;
  gap: 6px;
  margin-bottom: 8px;
}
.upload-btn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--text-dim);
  background: var(--bg-1);
  border: 1px dashed var(--line-strong);
  padding: 9px 8px;
  cursor: pointer;
  text-align: center;
  transition: all .2s;
}
.upload-btn:hover { color: var(--neon); border-color: var(--neon); }
.upload-clear {
  width: 30px;
  background: var(--bg-1);
  border: 1px solid var(--line-strong);
  color: var(--text-dim);
  cursor: pointer;
  font-size: 14px;
}
.upload-clear:hover { color: var(--warn); border-color: var(--warn); }

/* Formations grid */
.formation-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}
.formation-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 14px 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--text-dim);
  background: var(--bg-1);
  border: 1px solid var(--line);
  cursor: pointer;
  transition: all .2s;
}
.formation-btn:hover { color: var(--neon); border-color: var(--line-strong); }
.formation-btn.active {
  color: var(--neon);
  border-color: var(--neon);
  background: rgba(0,255,234,0.06);
  box-shadow: inset 0 0 18px rgba(0,255,234,0.12);
}
.formation-icon { font-size: 20px; line-height: 1; }

/* Cloud counter */
.cloud-counter {
  font-family: var(--mono);
  font-size: 22px;
  color: var(--neon);
  letter-spacing: 0.1em;
  margin: 6px 0 8px;
}

/* Right panel — gestures */
.gesture-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px;
  border: 1px solid var(--line);
  margin-bottom: 8px;
  background: rgba(0,255,234,0.02);
}
.gesture-icon {
  font-size: 24px;
  width: 38px;
  text-align: center;
  color: var(--neon);
}
.gesture-title {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--text);
}
.gesture-desc {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-top: 2px;
}
.gesture-status {
  margin-top: 10px;
  text-align: center;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--neon);
  padding: 6px;
  border-top: 1px solid var(--line);
}

/* Track row */
.track-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
}
.track-btn {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--neon);
  background: var(--bg-1);
  border: 1px solid var(--line-strong);
  padding: 10px;
  cursor: pointer;
  text-align: left;
}
.track-btn.playing {
  background: rgba(0,255,234,0.12);
  box-shadow: inset 0 0 16px rgba(0,255,234,0.18);
}

/* HUD readout */
.hud-readout {
  display: grid;
  gap: 6px;
}
.hud-row {
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  padding: 6px 8px;
  border: 1px solid var(--line);
  background: var(--bg-1);
}
.hud-row span { color: var(--text-dim); }
.hud-row b { color: var(--neon); font-weight: 500; }

/* ============================================================= */
/* BOTTOM HUD                                                     */
/* ============================================================= */
.hud-bottom {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding: 18px 28px;
  z-index: 40;
  pointer-events: none;
}
.hud-bottom-left { text-align: left; }
.hud-bottom-right { text-align: right; }
.hud-label {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.32em;
  color: var(--text-dim);
}
.hud-value.big {
  display: block;
  font-family: var(--mono);
  font-size: 38px;
  letter-spacing: 0.18em;
  color: var(--neon);
  text-shadow: 0 0 16px rgba(0,255,234,0.5);
  margin-top: 4px;
}

/* ============================================================= */
/* MODAL                                                          */
/* ============================================================= */
.modal {
  position: fixed; inset: 0;
  background: rgba(2, 5, 10, 0.78);
  backdrop-filter: blur(6px);
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 20px;
}
.modal[hidden] { display: none; }
.modal-card {
  width: min(640px, 100%);
  max-height: 90vh;
  overflow: auto;
  background: var(--panel-bg-solid);
  border: 1px solid var(--neon);
  box-shadow: 0 0 60px rgba(0,255,234,0.18), inset 0 0 0 1px rgba(0,255,234,0.05);
}
.modal-card.wide   { width: min(900px, 100%); }
.modal-card.narrow { width: min(420px, 100%); }
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--neon);
  border-bottom: 1px solid var(--line-strong);
  background: rgba(0,255,234,0.04);
}
.modal-close {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--warn);
  background: transparent;
  border: 1px solid var(--warn);
  padding: 5px 10px;
  cursor: pointer;
}

/* Drawing pad */
.pad-body {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 16px;
  padding: 16px;
}
#pad-canvas {
  background: #02050a;
  border: 1px solid var(--line-strong);
  width: 100%;
  height: auto;
  cursor: crosshair;
  image-rendering: pixelated;
}
.pad-controls {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* Editor */
.editor-body { padding: 16px; }
.editor-help {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-bottom: 10px;
  line-height: 1.6;
}
.editor-help code {
  background: rgba(0,255,234,0.08);
  color: var(--neon);
  padding: 1px 5px;
  border-radius: 2px;
}
#editor-textarea {
  width: 100%;
  height: 320px;
  background: #020812;
  color: var(--neon-soft);
  border: 1px solid var(--line-strong);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  padding: 12px;
  outline: none;
  resize: vertical;
  white-space: pre;
  tab-size: 2;
}
#editor-textarea:focus { border-color: var(--neon); }
.editor-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}
.editor-actions .primary-btn,
.editor-actions .ghost-btn { width: auto; flex: 0 0 auto; }
.editor-status {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--text-dim);
  margin-left: auto;
}
.editor-status.error { color: var(--warn); }
.editor-status.ok { color: var(--neon); }

/* Error modal */
.error-body { padding: 16px; }
#error-text {
  background: #020812;
  color: var(--warn);
  font-family: var(--mono);
  font-size: 12px;
  padding: 12px;
  border: 1px solid rgba(255, 79, 129, 0.4);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 320px;
  overflow: auto;
}

/* Guide */
.guide-body { padding: 16px; line-height: 1.6; }
.guide-prompt {
  background: #020812;
  color: var(--neon-soft);
  font-family: var(--mono);
  font-size: 11px;
  padding: 12px;
  border: 1px solid var(--line-strong);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 320px;
  overflow: auto;
  line-height: 1.5;
}

/* ============================================================= */
/* RESPONSIVE                                                     */
/* ============================================================= */
.mobile-only { display: none; }

@media (max-width: 1100px) {
  .panel-left  { width: 280px; }
  .panel-right { width: 240px; }
}

@media (max-width: 820px) {
  .mobile-only { display: inline-flex; }
  /* Side panels become slide-overs on mobile, hidden by default */
  .panel-left,
  .panel-right {
    position: fixed;
    width: min(86vw, 360px);
    max-height: calc(100vh - 100px);
    top: 70px;
    transition: transform .25s ease;
    z-index: 80;
  }
  .panel-left  { left: 0; transform: translateX(-110%); border-left: none; }
  .panel-right { right: 0; transform: translateX(110%); border-right: none; }
  .panel-left.open  { transform: translateX(0); }
  .panel-right.open { transform: translateX(0); }

  .hud-value.big { font-size: 26px; }
  .hud-bottom { padding: 14px 16px; }
  .brand-name { display: none; }
  .status-pill { font-size: 9px; letter-spacing: 0.18em; padding: 6px 10px; }
  .hud-top { gap: 8px; }
}

@media (max-width: 480px) {
  .panel-left,
  .panel-right { width: 92vw; top: 64px; }
  .hud-value.big { font-size: 20px; }
  .formation-grid { grid-template-columns: 1fr 1fr; }
  .pad-body { grid-template-columns: 1fr; }
}

/* Touch — bigger hit targets */
@media (hover: none) and (pointer: coarse) {
  .seg-btn, .formation-btn, .hud-btn { min-height: 36px; }
  input[type="range"]::-webkit-slider-thumb { width: 18px; height: 18px; }
  input[type="range"] { height: 6px; }
}