:root {
  --bg-color: #0d0e15;
  --text-main: #ffffff;
  --text-muted: #8b92a5;
  --card-bg: rgba(25, 28, 41, 0.6);

  --neon-blue: #00f0ff;
  --neon-blue-glow: rgba(0, 240, 255, 0.2);

  --neon-purple: #b026ff;
  --neon-purple-glow: rgba(176, 38, 255, 0.2);

  --neon-green: #00ff88;
  --neon-green-glow: rgba(0, 255, 136, 0.2);

  --neon-yellow: #ffea00;
  --neon-yellow-glow: rgba(255, 234, 0, 0.2);

  --neon-orange: #ff9a00;
  --neon-orange-glow: rgba(255, 154, 0, 0.2);

  --neon-red: #ff2a2a;
}

body {
  font-family: "Inter", sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
  background: radial-gradient(
    circle at 50% 0%,
    #1a1c29 0%,
    var(--bg-color) 70%
  );
  color: var(--text-main);
  padding: 20px;
  box-sizing: border-box;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: absolute;
  top: -20%;
  left: 50%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(
    circle,
    var(--neon-blue-glow) 0%,
    transparent 60%
  );
  transform: translateX(-50%);
  z-index: -1;
  pointer-events: none;
}

h1 {
  font-weight: 700;
  font-size: 2.5rem;
  margin-bottom: 5px;
  letter-spacing: -1px;
  text-transform: uppercase;
  background: linear-gradient(90deg, #fff, #a2b1cd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0px 4px 20px rgba(255, 255, 255, 0.1);
}

p.subtitle {
  color: var(--text-muted);
  font-weight: 300;
  margin-bottom: 30px;
  font-size: 1.1rem;
}

/* --- CONTROLS --- */
.controls-wrapper {
  display: flex;
  gap: 15px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  justify-content: center;
  max-width: 900px;
}

.mode-selector {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(0, 0, 0, 0.4);
  padding: 10px 18px;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.mode-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.3s ease;
}

#label-sra3.active {
  color: var(--neon-blue);
  text-shadow: 0 0 10px var(--neon-blue-glow);
}
#label-sra4.active {
  color: var(--neon-green);
  text-shadow: 0 0 10px var(--neon-green-glow);
}
#size-toggle:checked + .slider {
  border-color: var(--neon-green);
  box-shadow: 0 0 10px var(--neon-green-glow);
}
#size-toggle:checked + .slider:before {
  background-color: var(--neon-green);
  box-shadow: 0 0 10px var(--neon-green);
}

#label-clone.active {
  color: var(--neon-blue);
  text-shadow: 0 0 10px var(--neon-blue-glow);
}
#label-nest.active {
  color: var(--neon-purple);
  text-shadow: 0 0 10px var(--neon-purple-glow);
}
#mode-toggle:checked + .slider {
  border-color: var(--neon-purple);
  box-shadow: 0 0 10px var(--neon-purple-glow);
}
#mode-toggle:checked + .slider:before {
  background-color: var(--neon-purple);
  box-shadow: 0 0 10px var(--neon-purple);
}

#label-slug-off.active {
  color: var(--neon-blue);
  text-shadow: 0 0 10px var(--neon-blue-glow);
}
#label-slug-on.active {
  color: var(--neon-yellow);
  text-shadow: 0 0 10px var(--neon-yellow-glow);
}
#slug-toggle:checked + .slider {
  border-color: var(--neon-yellow);
  box-shadow: 0 0 10px var(--neon-yellow-glow);
}
#slug-toggle:checked + .slider:before {
  background-color: var(--neon-yellow);
  box-shadow: 0 0 10px var(--neon-yellow);
}

#label-simplex.active {
  color: var(--neon-blue);
  text-shadow: 0 0 10px var(--neon-blue-glow);
}
#label-duplex.active {
  color: var(--neon-orange);
  text-shadow: 0 0 10px var(--neon-orange-glow);
}
#duplex-toggle:checked + .slider {
  border-color: var(--neon-orange);
  box-shadow: 0 0 10px var(--neon-orange-glow);
}
#duplex-toggle:checked + .slider:before {
  background-color: var(--neon-orange);
  box-shadow: 0 0 10px var(--neon-orange);
}

.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.1);
  transition: 0.4s;
  border-radius: 30px;
  border: 1px solid var(--neon-blue);
  box-shadow: 0 0 10px var(--neon-blue-glow);
}
.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 3px;
  bottom: 3px;
  background-color: var(--neon-blue);
  transition: 0.4s;
  border-radius: 50%;
  box-shadow: 0 0 10px var(--neon-blue);
}
input:checked + .slider:before {
  transform: translateX(20px);
}

/* --- ADVANCED OVERRIDES PANEL --- */
.overrides-toggle {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text-muted);
  padding: 8px 16px;
  border-radius: 20px;
  cursor: pointer;
  margin-bottom: 25px;
  font-family: "Inter", sans-serif;
  font-size: 0.85rem;
  transition: all 0.3s;
  letter-spacing: 0.5px;
}
.overrides-toggle:hover {
  color: var(--text-main);
  border-color: var(--neon-blue);
  box-shadow: 0 0 10px var(--neon-blue-glow);
}

.overrides-panel {
  display: none;
  width: 100%;
  max-width: 600px;
  background: rgba(0, 0, 0, 0.5);
  border-radius: 16px;
  padding: 25px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 35px;
  backdrop-filter: blur(10px);
}
.overrides-panel.open {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.range-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.range-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.range-val {
  color: var(--neon-purple);
  font-weight: 700;
  text-shadow: 0 0 8px var(--neon-purple-glow);
}

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  background: transparent;
}
input[type="range"]:focus {
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  height: 18px;
  width: 18px;
  border-radius: 50%;
  background: var(--neon-purple);
  cursor: pointer;
  margin-top: -7px;
  box-shadow: 0 0 12px var(--neon-purple);
}
input[type="range"]::-webkit-slider-runnable-track {
  width: 100%;
  height: 4px;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 2px;
}

/* --- LAYOUT & DIVIDERS --- */
.app-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 800px;
  z-index: 10;
}
.section-header {
  width: 100%;
  text-align: center;
  margin: 10px 0 20px 0;
  position: relative;
}
.section-header span {
  background: var(--bg-color);
  padding: 0 20px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 3px;
  font-size: 0.8rem;
  font-weight: 700;
  position: relative;
  z-index: 2;
}
.section-header::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.15) 20%,
    rgba(255, 255, 255, 0.15) 80%,
    transparent
  );
  z-index: 1;
}
.zone-group {
  display: flex;
  flex-wrap: wrap;
  gap: 25px;
  justify-content: center;
  margin-bottom: 35px;
  width: 100%;
}

/* --- DROP ZONES --- */
.drop-zone {
  width: 320px;
  height: 160px;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 2px dashed;
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  color: var(--text-main);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  padding: 15px;
  box-sizing: border-box;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.zone-bc {
  border-color: rgba(0, 240, 255, 0.4);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}
.zone-bc:hover,
.zone-bc.hover {
  border-color: var(--neon-blue);
  background: rgba(0, 240, 255, 0.05);
  box-shadow:
    0 0 25px var(--neon-blue-glow),
    inset 0 0 15px var(--neon-blue-glow);
  transform: translateY(-5px) scale(1.02);
}

.zone-auto {
  border-color: rgba(176, 38, 255, 0.4);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}
.zone-auto:hover,
.zone-auto.hover {
  border-color: var(--neon-purple);
  background: rgba(176, 38, 255, 0.05);
  box-shadow:
    0 0 25px var(--neon-purple-glow),
    inset 0 0 15px var(--neon-purple-glow);
  transform: translateY(-5px) scale(1.02);
}

.drop-zone.error {
  border-color: var(--neon-red) !important;
  background: rgba(255, 42, 42, 0.1) !important;
  box-shadow:
    0 0 25px rgba(255, 42, 42, 0.3),
    inset 0 0 15px rgba(255, 42, 42, 0.2) !important;
  color: #fff;
}

.drop-zone strong {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
  pointer-events: none;
}
.drop-zone span {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 300;
  pointer-events: none;
  background: rgba(0, 0, 0, 0.3);
  padding: 4px 10px;
  border-radius: 20px;
  transition: all 0.3s ease;
}

.drop-zone::before {
  content: "";
  position: absolute;
  top: 15px;
  right: 15px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  opacity: 0.5;
}
.zone-bc::before {
  background-color: var(--neon-blue);
  box-shadow: 0 0 10px var(--neon-blue);
}
.zone-auto::before {
  background-color: var(--neon-purple);
  box-shadow: 0 0 10px var(--neon-purple);
}