/* ================================================================
   Tardigradia 2.0 — HUD & Opening Screen Styles
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Rajdhani:wght@300;500;700&display=swap');

:root {
  --hud-bg:       rgba(5, 8, 20, 0.85);
  --hud-border:   rgba(56, 189, 248, 0.25);
  --hud-text:     #e2e8f0;
  --accent-cyan:  #38bdf8;
  --accent-green: #10b981;
  --accent-purple:#a855f7;
  --accent-red:   #f43f5e;
  --accent-yellow:#fef08a;
  --transition:   0.28s cubic-bezier(0.4,0,0.2,1);
}

/* ── OPENING SCREEN ─────────────────────────────────────────── */
#opening-screen {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: radial-gradient(ellipse at center, #050814 0%, #000 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Rajdhani', sans-serif;
  color: var(--hud-text);
  overflow-y: auto;
  padding: 20px;
}

#opening-screen.hidden {
  display: none;
}

.opening-card {
  background: var(--hud-bg);
  border: 1px solid var(--hud-border);
  border-radius: 12px;
  backdrop-filter: blur(12px);
  padding: 36px 44px;
  max-width: 680px;
  width: 100%;
  box-shadow: 0 0 60px rgba(56,189,248,0.12);
}

.opening-title {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(1.2rem, 3vw, 1.9rem);
  font-weight: 900;
  text-align: center;
  background: linear-gradient(90deg, #38bdf8, #a855f7, #f43f5e);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 6px;
  text-shadow: none;
  filter: drop-shadow(0 0 12px rgba(56,189,248,0.7));
}

.opening-subtitle {
  text-align: center;
  color: #64748b;
  font-size: 0.85rem;
  margin-bottom: 28px;
  font-family: 'Rajdhani', sans-serif;
}

.opening-section {
  margin-bottom: 22px;
}

.opening-section-title {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  border-bottom: 1px solid rgba(56,189,248,0.2);
  padding-bottom: 6px;
  margin-bottom: 14px;
}

/* Resolution radio group */
.res-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.res-option {
  flex: 1;
  min-width: 110px;
  border: 1px solid rgba(56,189,248,0.2);
  border-radius: 8px;
  padding: 10px 14px;
  cursor: pointer;
  text-align: center;
  transition: var(--transition);
}

.res-option:hover {
  border-color: var(--accent-cyan);
  background: rgba(56,189,248,0.08);
}

.res-option.selected {
  border-color: var(--accent-cyan);
  background: rgba(56,189,248,0.15);
  box-shadow: 0 0 10px rgba(56,189,248,0.3);
}

.res-label {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.75rem;
  color: var(--accent-cyan);
}

.res-desc {
  font-size: 0.72rem;
  color: #64748b;
  margin-top: 2px;
}

/* Param sliders */
.param-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.param-label {
  width: 120px;
  font-size: 0.85rem;
  color: var(--hud-text);
  flex-shrink: 0;
}

.param-slider {
  flex: 1;
  -webkit-appearance: none;
  height: 4px;
  background: #1e293b;
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.param-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 6px rgba(56,189,248,0.8);
  transition: box-shadow 0.2s;
}

.param-slider.randomized::-webkit-slider-thumb {
  background: var(--accent-purple);
  box-shadow: 0 0 10px rgba(168,85,247,1);
}

.param-value {
  width: 44px;
  text-align: right;
  font-family: 'Orbitron', monospace;
  font-size: 0.78rem;
  color: var(--accent-cyan);
}

.param-rand-btn {
  background: none;
  border: 1px solid rgba(168,85,247,0.3);
  border-radius: 4px;
  color: #64748b;
  font-size: 0.8rem;
  padding: 0 5px;
  cursor: pointer;
  transition: var(--transition);
  line-height: 1.6;
  margin: 0;
}

.param-rand-btn:hover,
.param-rand-btn.active {
  border-color: var(--accent-purple);
  color: var(--accent-purple);
  background: rgba(168,85,247,0.1);
}

.opening-buttons {
  display: flex;
  gap: 12px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.btn-v2 {
  flex: 1;
  min-width: 120px;
  padding: 11px 18px;
  border-radius: 7px;
  border: 1px solid;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  margin: 0;
  transition: var(--transition);
}

.btn-v2-secondary {
  background: rgba(30,41,59,0.6);
  border-color: rgba(100,116,139,0.5);
  color: #94a3b8;
}

.btn-v2-secondary:hover {
  background: rgba(30,41,59,0.9);
  color: var(--hud-text);
}

.btn-v2-primary {
  background: rgba(56,189,248,0.15);
  border-color: rgba(56,189,248,0.6);
  color: var(--accent-cyan);
  box-shadow: 0 0 18px rgba(56,189,248,0.2);
}

.btn-v2-primary:hover {
  background: rgba(56,189,248,0.3);
  box-shadow: 0 0 30px rgba(56,189,248,0.4);
}

.btn-v2-load {
  background: rgba(168,85,247,0.12);
  border-color: rgba(168,85,247,0.5);
  color: var(--accent-purple);
}

.btn-v2-load:hover {
  background: rgba(168,85,247,0.25);
}

/* ── HUD PANELS ─────────────────────────────────────────────── */
.hud-panel {
  position: fixed;
  z-index: 20;
  background: var(--hud-bg);
  border: 1px solid var(--hud-border);
  border-radius: 8px;
  backdrop-filter: blur(10px);
  font-family: 'Rajdhani', sans-serif;
  color: var(--hud-text);
  font-size: 12px;
  transition: transform var(--transition), opacity var(--transition);
  pointer-events: auto;
  max-width: 280px;
  min-width: 200px;
}

.hud-panel.collapsed {
  pointer-events: none;
  opacity: 0;
}

/* Panel positions */
#hud-top {
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  min-width: unset;
  max-width: unset;
}
#hud-top.collapsed {
  transform: translateX(-50%) translateY(-120%);
  opacity: 0;
}

#hud-left {
  bottom: 12px;
  left: 12px;
}
#hud-left.collapsed {
  transform: translateX(calc(-100% - 16px));
  opacity: 0;
}

#hud-right {
  bottom: 12px;
  right: 12px;
}
#hud-right.collapsed {
  transform: translateX(calc(100% + 16px));
  opacity: 0;
}

#hud-pov {
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: none;
  pointer-events: none;
  min-width: 280px;
}
#hud-pov.active {
  display: block;
  pointer-events: none;
}

.hud-header {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 7px 10px 5px;
  border-bottom: 1px solid rgba(56,189,248,0.15);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.hud-body {
  padding: 8px 10px;
}

.hud-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 5px;
}

.hud-label {
  color: #64748b;
  font-size: 0.75rem;
}

.hud-value {
  font-family: 'Orbitron', monospace;
  font-size: 0.72rem;
  color: var(--accent-cyan);
}

/* small buttons inside HUD */
.hud-btn {
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid;
  cursor: pointer;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 2px;
  transition: var(--transition);
  background: transparent;
}

.hud-btn-cyan  { border-color: rgba(56,189,248,0.5);  color: var(--accent-cyan);  }
.hud-btn-green { border-color: rgba(16,185,129,0.5);  color: var(--accent-green); }
.hud-btn-red   { border-color: rgba(244,63,94,0.5);   color: var(--accent-red);   }
.hud-btn-purple{ border-color: rgba(168,85,247,0.5);  color: var(--accent-purple);}
.hud-btn-yellow{ border-color: rgba(254,240,138,0.5); color: var(--accent-yellow);}

.hud-btn-cyan:hover   { background: rgba(56,189,248,0.2);  }
.hud-btn-green:hover  { background: rgba(16,185,129,0.2);  }
.hud-btn-red:hover    { background: rgba(244,63,94,0.2);   }
.hud-btn-purple:hover { background: rgba(168,85,247,0.2);  }
.hud-btn-yellow:hover { background: rgba(254,240,138,0.2); }

.hud-btn.active-btn {
  box-shadow: 0 0 8px currentColor;
}

/* Population sliders */
.pop-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}

.pop-label {
  width: 82px;
  font-size: 0.72rem;
  color: var(--hud-text);
  flex-shrink: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pop-slider {
  flex: 1;
  -webkit-appearance: none;
  height: 3px;
  background: #1e293b;
  border-radius: 2px;
  cursor: pointer;
}

.pop-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 4px rgba(56,189,248,0.7);
}

.pop-count {
  width: 26px;
  text-align: right;
  font-family: 'Orbitron', monospace;
  font-size: 0.65rem;
  color: var(--accent-cyan);
}

/* mini +/- buttons */
.pop-adj {
  background: none;
  border: 1px solid rgba(56,189,248,0.3);
  color: var(--accent-cyan);
  border-radius: 3px;
  width: 16px;
  height: 16px;
  line-height: 1;
  font-size: 0.75rem;
  cursor: pointer;
  padding: 0;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pop-adj:hover {
  background: rgba(56,189,248,0.15);
}

/* HUD hide-all toggle (top-right corner) */
#hud-master-toggle {
  position: fixed;
  top: 10px;
  right: 12px;
  z-index: 50;
  background: var(--hud-bg);
  border: 1px solid var(--hud-border);
  border-radius: 6px;
  color: var(--accent-cyan);
  font-family: 'Orbitron', sans-serif;
  font-size: 0.65rem;
  padding: 6px 10px;
  cursor: pointer;
  letter-spacing: 0.06em;
  transition: var(--transition);
  margin: 0;
}

#hud-master-toggle:hover {
  background: rgba(56,189,248,0.12);
}

/* Collapse toggle arrow inside panel header */
.panel-collapse-btn {
  background: none;
  border: none;
  color: #475569;
  font-size: 0.7rem;
  cursor: pointer;
  padding: 0 2px;
  margin: 0;
  transition: color 0.2s;
}

.panel-collapse-btn:hover {
  color: var(--accent-cyan);
}

/* Panel pull-tabs (visible when collapsed) */
.panel-tab {
  position: fixed;
  z-index: 25;
  background: var(--hud-bg);
  border: 1px solid var(--hud-border);
  border-radius: 4px;
  color: var(--accent-cyan);
  font-family: 'Orbitron', sans-serif;
  font-size: 0.6rem;
  padding: 5px 4px;
  cursor: pointer;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 0.06em;
  margin: 0;
  transition: var(--transition);
  display: none;
}

.panel-tab:hover {
  background: rgba(56,189,248,0.12);
}

.panel-tab.visible {
  display: block;
}

#tab-left  { left: 4px;  bottom: 120px; }
#tab-right { right: 4px; bottom: 120px; }

/* Benevolence chart container */
#benevolence-chart-wrap {
  position: relative;
  height: 90px;
  margin-top: 4px;
}

/* Scrollable event log */
.hud-log {
  max-height: 80px;
  overflow-y: auto;
  font-family: 'Rajdhani', monospace;
  font-size: 0.68rem;
  scrollbar-width: thin;
  scrollbar-color: rgba(56,189,248,0.4) transparent;
}

.hud-log li {
  list-style: none;
  padding: 1px 0 1px 6px;
  border-left: 2px solid rgba(56,189,248,0.2);
  margin-bottom: 2px;
  color: #94a3b8;
}

/* POV overlay bar */
#hud-pov .pov-name {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.9rem;
  color: var(--accent-cyan);
  text-align: center;
  padding: 6px 0 2px;
  text-transform: uppercase;
}

#hud-pov .pov-particle {
  text-align: center;
  font-size: 0.68rem;
  color: #64748b;
  margin-bottom: 6px;
}

.pov-bar-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 10px 8px;
}

.pov-bar-label {
  width: 40px;
  font-size: 0.7rem;
  color: #64748b;
}

.pov-bar-track {
  flex: 1;
  height: 6px;
  background: #1e293b;
  border-radius: 3px;
  overflow: hidden;
}

.pov-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.15s linear;
}

.pov-bar-fill.energy  { background: linear-gradient(90deg, #10b981, #38bdf8); }
.pov-bar-fill.age     { background: linear-gradient(90deg, #f97316, #f43f5e); }

/* wake-lock status indicator */
#wake-indicator {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 4px;
  background: #475569;
  transition: background 0.3s;
}

#wake-indicator.active {
  background: var(--accent-green);
  box-shadow: 0 0 5px var(--accent-green);
}

/* random toggle glow on sliders */
.param-slider.randomized::-webkit-slider-thumb {
  background: var(--accent-purple);
  box-shadow: 0 0 10px rgba(168,85,247,1);
  animation: randPulse 1.2s ease-in-out infinite;
}

@keyframes randPulse {
  0%, 100% { box-shadow: 0 0 6px rgba(168,85,247,0.8); }
  50%       { box-shadow: 0 0 14px rgba(168,85,247,1); }
}

/* scrollbar styling */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: rgba(0,0,0,0.2); }
::-webkit-scrollbar-thumb { background: rgba(56,189,248,0.4); border-radius: 2px; }