:root {
  color-scheme: dark;
  --bg: #070A10;
  --panel: #0B1323;
  --inputBg: #050A15;
  --text: #F0F7FF;
  --textBright: #FFFFFF;
  --muted: #B8C5DC;
  --line: rgba(0,229,255,.28);
  --neonC: #00E5FF;
  --neonG: #6CFF7C;
  --radius: 16px;
  --shadow: 0 14px 50px rgba(0,0,0,.6);
  --glowC: 0 0 28px rgba(0,229,255,.35), 0 0 56px rgba(0,229,255,.18);
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}


* { box-sizing: border-box; }


body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  background: 
    radial-gradient(1200px 700px at 15% -10%, rgba(0,229,255,.14), transparent 55%),
    radial-gradient(900px 600px at 40% 110%, rgba(108,255,124,.10), transparent 55%),
    linear-gradient(180deg, #05070B, #070A10 55%, #05070B);
  min-height: 100vh;
  overflow-x: hidden;
}


body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: 
    linear-gradient(to right, rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: .24;
  mix-blend-mode: overlay;
}


.wrap {
  max-width: 700px;
  margin: 0 auto;
  padding: 26px 16px 40px;
}


.lang-switcher {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-bottom: 20px;
}


.lang-btn {
  padding: 8px 16px;
  background: var(--inputBg);
  border: 2px solid rgba(0,229,255,.2);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}


.lang-btn:hover {
  border-color: var(--neonC);
  background: rgba(0,229,255,.1);
}


.lang-btn.active {
  background: linear-gradient(135deg, rgba(0,229,255,.2), rgba(108,255,124,.2));
  border-color: var(--neonC);
  color: var(--neonC);
}


.logo-container {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 24px;
  padding: 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-height: 120px;
}


.logo-container img {
  max-width: 100%;
  max-height: 100px;
  object-fit: contain;
}


.logo-placeholder {
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
  font-style: italic;
}


header {
  text-align: center;
  margin-bottom: 32px;
}


h1 {
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  font-weight: 700;
  margin: 0 0 8px 0;
  background: linear-gradient(135deg, var(--neonC), var(--neonG));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: var(--glowC);
}


.subtitle {
  font-size: 1rem;
  color: var(--muted);
  margin: 0;
}


.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}


.input-group {
  margin-bottom: 20px;
}


.input-group:last-child {
  margin-bottom: 0;
}


label {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--textBright);
  margin-bottom: 8px;
}


.hint {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 4px;
}


input {
  width: 100%;
  padding: 14px 16px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--textBright);
  background: var(--inputBg);
  border: 2px solid rgba(0,229,255,.2);
  border-radius: 12px;
  outline: none;
  transition: all 0.2s;
}


input:focus {
  border-color: var(--neonC);
  box-shadow: 0 0 0 3px rgba(0,229,255,.15);
}


input[readonly] {
  background: rgba(5,10,21,.6);
  border-color: rgba(0,229,255,.1);
  cursor: not-allowed;
  opacity: 0.9;
}


.results {
  background: linear-gradient(135deg, rgba(0,229,255,.08), rgba(108,255,124,.08));
  border: 2px solid rgba(0,229,255,.3);
  border-radius: var(--radius);
  padding: 20px;
  margin-top: 24px;
}


.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,.1);
}


.result-row:nth-last-child(2) {
  border-bottom: none;
}


.result-row:last-child {
  border-bottom: none;
  padding-top: 16px;
  margin-top: 8px;
  border-top: 2px solid rgba(0,229,255,.4);
}


.result-label {
  font-size: 0.95rem;
  color: var(--muted);
  font-weight: 500;
}


.result-value {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--textBright);
}


.result-row:last-child .result-label {
  font-size: 1.1rem;
  color: var(--neonG);
  font-weight: 700;
}


.result-row:last-child .result-value {
  font-size: 1.5rem;
  color: var(--neonG);
  text-shadow: var(--glowC);
}


.negative {
  color: #FF6B6B !important;
}


.disclaimer {
  text-align: center;
  margin-top: 24px;
  padding: 16px;
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 12px;
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.5;
}


.disclaimer strong {
  color: var(--textBright);
  font-weight: 600;
}


@media (max-width: 600px) {
  .wrap {
    padding: 20px 12px;
  }


  .card {
    padding: 20px 16px;
  }


  h1 {
    font-size: 1.6rem;
  }


  .logo-container {
    min-height: 100px;
  }


  .logo-container img {
    max-height: 80px;
  }


  .lang-switcher {
    gap: 6px;
  }


  .lang-btn {
    padding: 6px 12px;
    font-size: 0.85rem;
  }
}