:root {
  --bg: #0a0014;
  --bg2: #140029;
  --neon: #c77dff;
  --neon2: #9d4edd;
  --neon3: #e0aaff;
  --ink: #f5e6ff;
  --muted: #a78bc7;
  --glow: 0 0 12px rgba(199, 125, 255, 0.6), 0 0 24px rgba(157, 78, 221, 0.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1000px 600px at 20% 0%, rgba(157, 78, 221, 0.25), transparent 60%),
    radial-gradient(800px 500px at 80% 100%, rgba(199, 125, 255, 0.2), transparent 60%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg2) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 420px;
  background: rgba(20, 0, 41, 0.7);
  border: 1px solid rgba(199, 125, 255, 0.35);
  border-radius: 18px;
  padding: 28px;
  backdrop-filter: blur(14px);
  box-shadow: var(--glow);
}

h1 {
  margin: 0;
  font-size: 28px;
  font-weight: 700;
  color: var(--neon3);
  text-shadow: 0 0 10px rgba(199, 125, 255, 0.7), 0 0 22px rgba(157, 78, 221, 0.5);
  letter-spacing: 0.5px;
}

.sub {
  margin: 4px 0 22px;
  color: var(--muted);
  font-size: 13px;
}

.field {
  display: block;
  margin-bottom: 20px;
}

.field > span {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--muted);
  margin-bottom: 8px;
}

.field > span em {
  font-style: normal;
  color: var(--neon3);
  font-size: 14px;
  text-shadow: 0 0 8px rgba(199, 125, 255, 0.7);
}

.input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.prefix {
  position: absolute;
  left: 14px;
  color: var(--neon);
  font-weight: 600;
  text-shadow: 0 0 6px rgba(199, 125, 255, 0.6);
}

input[type="number"] {
  width: 100%;
  padding: 14px 14px 14px 28px;
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  background: rgba(10, 0, 20, 0.6);
  border: 1px solid rgba(199, 125, 255, 0.4);
  border-radius: 12px;
  outline: none;
  transition: all 0.2s;
}

input[type="number"]:focus {
  border-color: var(--neon);
  box-shadow: 0 0 0 3px rgba(199, 125, 255, 0.2), 0 0 12px rgba(199, 125, 255, 0.4);
}

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--neon2), var(--neon));
  box-shadow: 0 0 8px rgba(199, 125, 255, 0.5);
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--neon3);
  border: 2px solid var(--neon);
  cursor: pointer;
  box-shadow: 0 0 10px rgba(199, 125, 255, 0.9), 0 0 20px rgba(157, 78, 221, 0.6);
  transition: transform 0.15s;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--neon3);
  border: 2px solid var(--neon);
  cursor: pointer;
  box-shadow: 0 0 10px rgba(199, 125, 255, 0.9);
}

.presets {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  margin-top: 10px;
}

.presets button {
  padding: 8px 4px;
  font-size: 12px;
  font-weight: 600;
  color: var(--neon3);
  background: rgba(157, 78, 221, 0.12);
  border: 1px solid rgba(199, 125, 255, 0.35);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
}

.presets button:hover {
  background: rgba(199, 125, 255, 0.25);
  box-shadow: 0 0 10px rgba(199, 125, 255, 0.5);
}

.presets button.active {
  background: rgba(199, 125, 255, 0.35);
  border-color: var(--neon);
  color: var(--ink);
  box-shadow: 0 0 10px rgba(199, 125, 255, 0.7), inset 0 0 8px rgba(224, 170, 255, 0.25);
}

.results {
  margin-top: 26px;
  padding: 18px;
  background: rgba(10, 0, 20, 0.55);
  border: 1px solid rgba(199, 125, 255, 0.25);
  border-radius: 14px;
}

.row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  color: var(--muted);
  font-size: 14px;
}

.row strong {
  color: var(--ink);
  font-size: 18px;
  font-weight: 700;
}

.row.big {
  border-top: 1px dashed rgba(199, 125, 255, 0.3);
  margin-top: 6px;
  padding-top: 14px;
}

.row.big span {
  color: var(--neon3);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 12px;
}

.row.big strong {
  font-size: 26px;
  color: var(--neon3);
  text-shadow: 0 0 10px rgba(199, 125, 255, 0.8), 0 0 20px rgba(157, 78, 221, 0.5);
}