/* Revamped CSS: Minimalist Aesthetic, Collapsible Panel, No Emojis, High-End Layout */

:root {
  --bg-primary: #0f0f11;
  --bg-secondary: #18181b;
  --accent-pink: #e4e4e7;   /* light silver/white */
  --accent-cyan: #a1a1aa;   /* medium silver */
  --accent-purple: #3f3f46; /* gunmetal gray */
  --text-main: #f4f4f5;
  --text-muted: #71717a;
  --glass-bg: rgba(15, 15, 17, 0.85);
  --glass-border: rgba(255, 255, 255, 0.04);
  --font-hud: 'Outfit', sans-serif;
  --font-arabic: 'Cairo', sans-serif;
  --font-title: 'Syncopate', sans-serif;
  --shadow-glow-pink: 0 0 15px rgba(255, 255, 255, 0.15);
  --shadow-glow-cyan: 0 0 15px rgba(161, 161, 170, 0.2);
  --toggle-active-bg: rgba(161, 161, 170, 0.25);
  --toggle-inactive-bg: rgba(255, 255, 255, 0.04);
  --toggle-inactive-border: rgba(255, 255, 255, 0.08);
  --toggle-inactive-thumb: #71717a;
  --cube-glow: 0 0 30px rgba(161, 161, 170, 0.35), inset 0 0 15px rgba(161, 161, 170, 0.15);
  --cube-glow-idle: 0 0 25px rgba(161, 161, 170, 0.12), inset 0 0 20px rgba(255, 255, 255, 0.04);
}

body.theme-gray {
  --bg-primary: #0f0f11;
  --bg-secondary: #18181b;
  --accent-pink: #e4e4e7;
  --accent-cyan: #a1a1aa;
  --accent-purple: #3f3f46;
  --text-main: #f4f4f5;
  --text-muted: #71717a;
  --glass-bg: rgba(15, 15, 17, 0.85);
  --glass-border: rgba(255, 255, 255, 0.04);
  --shadow-glow-pink: 0 0 15px rgba(255, 255, 255, 0.15);
  --shadow-glow-cyan: 0 0 15px rgba(161, 161, 170, 0.2);
  --toggle-active-bg: rgba(161, 161, 170, 0.25);
  --toggle-inactive-bg: rgba(255, 255, 255, 0.04);
  --toggle-inactive-border: rgba(255, 255, 255, 0.08);
  --toggle-inactive-thumb: #71717a;
  --cube-glow: 0 0 30px rgba(161, 161, 170, 0.35), inset 0 0 15px rgba(161, 161, 170, 0.15);
  --cube-glow-idle: 0 0 25px rgba(161, 161, 170, 0.12), inset 0 0 20px rgba(255, 255, 255, 0.04);
}

body.theme-cyberpunk {
  --bg-primary: #05030a;
  --bg-secondary: #0d091a;
  --accent-pink: #ff007f;
  --accent-cyan: #00f0ff;
  --accent-purple: #8a2be2;
  --text-main: #f5f2fc;
  --text-muted: #8c81a3;
  --glass-bg: rgba(5, 3, 10, 0.85);
  --glass-border: rgba(255, 255, 255, 0.05);
  --shadow-glow-pink: 0 0 20px rgba(255, 0, 127, 0.4);
  --shadow-glow-cyan: 0 0 20px rgba(0, 240, 255, 0.4);
  --toggle-active-bg: rgba(138, 43, 226, 0.35);
  --toggle-inactive-bg: rgba(138, 43, 226, 0.1);
  --toggle-inactive-border: rgba(138, 43, 226, 0.25);
  --toggle-inactive-thumb: #8c81a3;
  --cube-glow: 0 0 30px rgba(0, 240, 255, 0.45), inset 0 0 15px rgba(0, 240, 255, 0.2);
  --cube-glow-idle: 0 0 25px rgba(0, 240, 255, 0.15), inset 0 0 20px rgba(255, 255, 255, 0.04);
}

body.theme-midnight {
  --bg-primary: #020617;
  --bg-secondary: #0f172a;
  --accent-pink: #38bdf8;
  --accent-cyan: #0ea5e9;
  --accent-purple: #1e3a8a;
  --text-main: #f8fafc;
  --text-muted: #64748b;
  --glass-bg: rgba(2, 6, 23, 0.85);
  --glass-border: rgba(255, 255, 255, 0.04);
  --shadow-glow-pink: 0 0 20px rgba(56, 189, 248, 0.3);
  --shadow-glow-cyan: 0 0 20px rgba(14, 165, 233, 0.35);
  --toggle-active-bg: rgba(30, 58, 138, 0.45);
  --toggle-inactive-bg: rgba(30, 58, 138, 0.15);
  --toggle-inactive-border: rgba(30, 58, 138, 0.3);
  --toggle-inactive-thumb: #64748b;
  --cube-glow: 0 0 30px rgba(14, 165, 233, 0.4), inset 0 0 15px rgba(14, 165, 233, 0.2);
  --cube-glow-idle: 0 0 25px rgba(14, 165, 233, 0.15), inset 0 0 20px rgba(255, 255, 255, 0.04);
}

body.theme-toxic {
  --bg-primary: #050b05;
  --bg-secondary: #091a09;
  --accent-pink: #39ff14;
  --accent-cyan: #00ff66;
  --accent-purple: #064e3b;
  --text-main: #f0fdf4;
  --text-muted: #52a46c;
  --glass-bg: rgba(5, 11, 5, 0.85);
  --glass-border: rgba(255, 255, 255, 0.04);
  --shadow-glow-pink: 0 0 20px rgba(57, 255, 20, 0.35);
  --shadow-glow-cyan: 0 0 20px rgba(0, 255, 102, 0.35);
  --toggle-active-bg: rgba(6, 78, 59, 0.45);
  --toggle-inactive-bg: rgba(6, 78, 59, 0.15);
  --toggle-inactive-border: rgba(6, 78, 59, 0.3);
  --toggle-inactive-thumb: #52a46c;
  --cube-glow: 0 0 30px rgba(0, 255, 102, 0.45), inset 0 0 15px rgba(0, 255, 102, 0.2);
  --cube-glow-idle: 0 0 25px rgba(0, 255, 102, 0.15), inset 0 0 20px rgba(255, 255, 255, 0.04);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}

body, html {
  width: 100%;
  height: 100%;
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-hud);
  overflow: hidden;
}

/* ==========================================================================
   Ultra-Clean Minimalist Entrance Screen (Disguised)
   ========================================================================== */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: var(--bg-primary);
  transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), visibility 1s;
}

.overlay.fade-out {
  opacity: 0;
  visibility: hidden;
}

.glow-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 50%, rgba(138, 43, 226, 0.06) 0%, rgba(5, 3, 10, 1) 80%);
  animation: glowPulse 12s infinite alternate ease-in-out;
  z-index: 1;
}

.entrance-container {
  position: relative;
  z-index: 2;
  width: 90%;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 20px;
}

.geometry-spinner {
  margin-bottom: 40px;
  display: flex;
  justify-content: center;
  animation: slowSpin 25s infinite linear;
}

.branding-header {
  font-family: var(--font-title);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 6px;
  color: rgba(255, 255, 255, 0.35);
  margin-bottom: 20px;
  text-transform: uppercase;
}

.flow-title {
  font-family: var(--font-hud);
  font-weight: 300;
  font-size: 2.3rem;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.flow-desc {
  font-size: 0.85rem;
  line-height: 1.7;
  font-weight: 300;
  color: var(--text-muted);
  margin-bottom: 40px;
}

.glow-btn {
  font-family: var(--font-hud);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 2px;
  color: #fff;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 16px 42px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: none;
  animation: syncButtonGlow 2s infinite alternate ease-in-out;
}

.version-tag {
  margin-top: 50px;
  font-size: 0.65rem;
  color: rgba(255, 255, 255, 0.2);
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* ==========================================================================
   Main Content Layout
   ========================================================================== */
#main-content {
  width: 100%;
  height: 100%;
  position: relative;
  z-index: 10;
}

#main-content.hidden {
  display: none;
}

.ambient-gradient {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  background: radial-gradient(circle at 50% 50%, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  transition: background 0.4s ease;
}

#chaos-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  transform: translate3d(0, 0, 0);
  will-change: transform;
}

/* ==========================================================================
   HUD Layout (Interactive)
   ========================================================================== */
.hud-header {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  padding: 24px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 100;
  pointer-events: none;
}

.hud-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  pointer-events: auto;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow-cyan);
  animation: blinkCyan 1.2s infinite alternate;
  margin-top: 15px;
}

.hud-brand {
  font-family: var(--font-hud);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 2px;
  color: #fff;
  animation: hudBrandPulse 1.5s infinite alternate ease-in-out;
}

.hud-right {
  display: flex;
  align-items: center;
  gap: 20px;
  pointer-events: auto;
}


.hud-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #fff;
  font-family: var(--font-hud);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 1.5px;
  padding: 9px 20px;
  border-radius: 4px;
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  animation: syncButtonGlow 2s infinite alternate ease-in-out;
}

/* ==========================================================================
   Reworked Collapsible Control Panel
   ========================================================================== */
.control-panel {
  position: absolute;
  top: 0;
  left: 0;
  width: 320px;
  height: 100%;
  padding: 20px 24px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  z-index: 150;
  background: var(--glass-bg);
  border-right: 1px solid var(--glass-border);
  backdrop-filter: blur(25px);
  box-shadow: 15px 0 50px rgba(0, 0, 0, 0.4);
  transform: translateX(-100%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-y: auto;
}

.control-panel::-webkit-scrollbar {
  width: 4px;
}
.control-panel::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.02);
}
.control-panel::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent-cyan), var(--accent-purple));
  border-radius: 10px;
}
.control-panel::-webkit-scrollbar-thumb:hover {
  background: var(--accent-pink);
}

.select-wrapper {
  position: relative;
  display: flex;
  width: 100%;
}

.hud-select {
  display: none !important;
}

.select-trigger {
  width: 100%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--toggle-inactive-border);
  color: var(--text-main);
  font-family: var(--font-hud);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 8px 12px;
  padding-right: 42px; /* make space for arrow */
  border-radius: 4px;
  outline: none;
  cursor: pointer;
  transition: all 0.3s;
  user-select: none;
  text-align: left;
}

.select-wrapper:hover .select-trigger, .select-wrapper.open .select-trigger {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow-cyan);
}

.select-options-list {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: 4px;
  margin-top: 4px;
  max-height: 160px;
  overflow-y: auto;
  z-index: 1000;
  display: none; /* hidden by default */
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.6);
}

.select-options-list::-webkit-scrollbar {
  width: 5px;
}
.select-options-list::-webkit-scrollbar-track {
  background: transparent;
}
.select-options-list::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 10px;
}
.select-options-list::-webkit-scrollbar-thumb:hover {
  background: var(--accent-cyan);
}

.select-wrapper.open .select-options-list {
  display: block; /* show when open */
}

.select-option-item {
  padding: 8px 12px;
  font-family: var(--font-hud);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
  text-align: left;
}

.select-option-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}

.select-option-item.selected {
  background: rgba(255, 255, 255, 0.08);
  color: var(--accent-cyan);
}

.select-wrapper::after {
  content: '';
  position: absolute;
  right: 12px; /* original spacing from edge */
  top: 50%;
  width: 10px;
  height: 6px;
  transform: translateY(-50%);
  background-color: var(--text-muted);
  -webkit-mask: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 6' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m1 1 4 4 4-4'/%3E%3C/svg%3E") no-repeat center;
  mask: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 6' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m1 1 4 4 4-4'/%3E%3C/svg%3E") no-repeat center;
  -webkit-mask-size: contain;
  mask-size: contain;
  pointer-events: none;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.25s ease;
  transform-origin: center;
}

.select-wrapper:hover::after, .select-wrapper.open::after {
  background-color: var(--accent-cyan);
}

.select-wrapper.open::after {
  transform: translateY(-50%) rotate(180deg); /* smooth spin transition to ^ when open */
}

.hud-select option {
  background: var(--bg-secondary);
  color: var(--text-main);
}

.control-panel.active {
  transform: translateX(0);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding-bottom: 14px;
  margin-bottom: 6px;
}

.panel-header h3 {
  font-family: var(--font-hud);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 1px;
  color: #fff;
}

.panel-section-title {
  font-family: var(--font-hud);
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--accent-cyan);
  text-transform: uppercase;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 6px;
  margin-top: 14px;
  margin-bottom: -4px;
  user-select: none;
}

.close-btn {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.15);
  font-family: var(--font-hud);
  font-weight: 700;
  font-size: 0.65rem;
  letter-spacing: 1px;
  padding: 5px 12px;
  border-radius: 4px;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  animation: syncButtonGlow 2s infinite alternate ease-in-out;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.control-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.control-group.disabled-control {
  opacity: 0.35;
  pointer-events: none;
}

.control-group label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
}

.value-display {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-top: 2px;
}

/* Range Input */
input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 5px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-cyan);
  cursor: pointer;
  box-shadow: var(--shadow-glow-cyan);
  transition: transform 0.1s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.35);
}

/* Toggles & Switches */
.toggle-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.toggle-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-main);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 20px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--toggle-inactive-bg);
  transition: .3s;
  border: 1px solid var(--toggle-inactive-border);
}

.slider:before {
  position: absolute;
  content: "";
  height: 12px;
  width: 12px;
  left: 3px;
  bottom: 3px;
  background-color: var(--toggle-inactive-thumb);
  transition: .3s;
}

input:checked + .slider {
  background-color: var(--toggle-active-bg);
  border-color: var(--accent-cyan);
}

input:checked + .slider:before {
  transform: translateX(20px);
  background-color: var(--accent-pink);
  box-shadow: var(--shadow-glow-pink);
}

.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}

/* Action Buttons */
.buttons-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 10px;
}

.control-btn {
  flex: 1;
  padding: 11px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
  color: #fff;
  font-family: var(--font-hud);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  animation: syncButtonGlow 2s infinite alternate ease-in-out;
}

/* ==========================================================================
   Unified Glowing Hover Animations for consistent buttons
   ========================================================================== */
.hud-btn:hover, .close-btn:hover, .control-btn:hover, .glow-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--accent-cyan) !important;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-cyan) !important;
}

.hud-btn.active, .close-btn.active, .control-btn.active, .glow-btn.active {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--accent-cyan) !important;
  box-shadow: var(--shadow-glow-cyan) !important;
}

.hud-btn:active, .close-btn:active, .control-btn:active, .glow-btn:active {
  transform: translateY(0);
}

#chaos-btn {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 0 10px rgba(255, 0, 127, 0.4);
  animation: syncChaosGlow 2s infinite alternate ease-in-out;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

#chaos-btn:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--shadow-glow-pink) !important;
  border-color: var(--accent-pink) !important;
}

@keyframes syncButtonGlow {
  0% {
    box-shadow: 0 0 0px rgba(255, 255, 255, 0);
    border-color: rgba(255, 255, 255, 0.1);
  }
  100% {
    box-shadow: var(--shadow-glow-cyan);
    border-color: var(--accent-cyan);
  }
}

@keyframes syncChaosGlow {
  0% {
    box-shadow: 0 0 0px rgba(255, 255, 255, 0);
    border-color: rgba(255, 255, 255, 0.1);
  }
  100% {
    box-shadow: var(--shadow-glow-pink);
    border-color: var(--accent-pink);
  }
}

/* System Stats */
.system-stats {
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 20px;
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.system-stats span {
  font-weight: 700;
  color: var(--accent-cyan);
}

/* ==========================================================================
   Center Stage & 3D Rotating Cube
   ========================================================================== */
.center-stage {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10;
  pointer-events: none;
  transition: opacity 0.5s ease;
  transform: translate3d(0, 0, 0);
  will-change: transform;
}

.cube-wrapper {
  perspective: 1000px;
  width: 220px;
  height: 220px;
  position: relative;
  pointer-events: auto;
}


.face-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  border-radius: 4px;
  filter: url(#chromakey);
  opacity: 0.72;
  z-index: 10;
}

.cube {
  width: 100%;
  height: 100%;
  position: absolute;
  transform-style: preserve-3d;
}

.face {
  position: absolute;
  width: 220px;
  height: 220px;
  border: 1px solid var(--toggle-inactive-border);
  box-shadow: var(--cube-glow-idle);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  backface-visibility: visible;
  border-radius: 4px;
  transition: border-color 0.4s, box-shadow 0.4s;
}

.cube:hover .face {
  border-color: var(--accent-cyan);
  box-shadow: var(--cube-glow);
}

/* 3D Face coordinates */
.front  { transform: rotateY(0deg) translateZ(110px); }
.back   { transform: rotateY(180deg) translateZ(110px); }
.right  { transform: rotateY(90deg) translateZ(110px); }
.left   { transform: rotateY(-90deg) translateZ(110px); }
.top    { transform: rotateX(90deg) translateZ(110px); }
.bottom { transform: rotateX(-90deg) translateZ(110px); }

/* ==========================================================================
   Animations Keyframes
   ========================================================================== */
@keyframes glowPulse {
  0% {
    background: radial-gradient(circle at 50% 50%, rgba(138, 43, 226, 0.05) 0%, rgba(5, 3, 10, 1) 80%);
  }
  100% {
    background: radial-gradient(circle at 50% 50%, rgba(0, 240, 255, 0.04) 0%, rgba(5, 3, 10, 1) 80%);
  }
}

@keyframes slowSpin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}


@keyframes blinkCyan {
  0% { opacity: 0.3; }
  100% { opacity: 1; }
}

@keyframes hudBrandPulse {
  0% {
    opacity: 0.5;
    text-shadow: 0 0 2px rgba(255, 255, 255, 0.1);
  }
  100% {
    opacity: 1;
    text-shadow: 0 0 8px var(--accent-cyan), 0 0 16px var(--accent-cyan);
  }
}

@keyframes cubeSpin {
  0% {
    transform: rotateX(0deg) rotateY(0deg) rotateZ(0deg);
  }
  100% {
    transform: rotateX(360deg) rotateY(360deg) rotateZ(360deg);
  }
}

/* ==========================================================================
   Debug Panel (Collapsible Stats Overlay)
   ========================================================================== */
.debug-panel {
  position: absolute;
  top: 0;
  left: 0;
  width: 320px;
  height: 100%;
  padding: 20px 24px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  z-index: 150;
  background: var(--glass-bg);
  border-right: 1px solid var(--glass-border);
  backdrop-filter: blur(25px);
  box-shadow: 15px 0 50px rgba(0, 0, 0, 0.4);
  transform: translateX(-100%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-y: auto;
  pointer-events: auto;
}

.debug-panel.active {
  transform: translateX(0);
}

/* ==========================================================================
   Custom Glassmorphic Modal Dialog
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(15px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 3000;
  opacity: 1;
  transition: opacity 0.3s ease;
}

.modal-overlay.hidden {
  display: none !important;
  opacity: 0;
}

.modal-content {
  width: 90%;
  max-width: 420px;
  padding: 24px;
  border-radius: 8px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
  transform: scale(1);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  display: flex;
  flex-direction: column;
}

.modal-overlay.hidden .modal-content {
  transform: scale(0.9);
}

/* ==========================================================================
   Responsive Adaptation
   ========================================================================== */
@media (max-width: 900px) {
  .control-panel {
    width: 290px;
  }
  
  .flow-title {
    font-size: 1.8rem;
  }
  
  .hud-header {
    padding: 16px 20px;
  }
  
}

@keyframes fadeInUpIntro {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}