:root {
  --bg: #06141a;
  --card: #0b222a;
  --ink: #e6fbff;
  --muted: #a9ddea;
  --accent: #00e0ff;
  --border: #00e0ff22;
}
* { box-sizing: border-box; }
body, html {
  margin: 0;
  width: 100%;
  min-height: 100vh;
  overflow-x: hidden;
}
body {
  display: flex;
  justify-content: center;
  align-items: center;
  background: #000;
  font-family: system-ui, 'Segoe UI', Roboto, Arial;
  position: relative;
}
.content {
  position: relative;
  z-index: 2;
  max-width: 1100px;
  width: 94%;
  padding: 2rem;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(0,224,255,.06), transparent 180px), rgba(11, 34, 42, 0.6);
  box-shadow: 0 14px 40px rgba(0,0,0,.45);
  backdrop-filter: blur(4px);
  pointer-events: none;
}
.content * { pointer-events: auto; }
h1 {
  font-size: 1.8rem;
  margin-top: 0.2rem;
  margin-bottom: 0.5rem;
  color: var(--accent);
  text-align: center;
  font-weight: 600;
  letter-spacing: 2px;
}
.subtitle {
  text-align: center;
  color: var(--muted);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
  border-bottom: 1px dashed var(--border);
  padding-bottom: 1rem;
}
form { margin-top: 1rem; }
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1rem;
}
@media (max-width: 980px) {
  .grid { grid-template-columns: 1fr; }
}
.col {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1rem;
  background: rgba(0,224,255,0.03);
}
.col h2 {
  margin: 0 0 0.8rem 0;
  color: var(--ink);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 1px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.row {
  display: grid;
  grid-template-columns: 70px 1fr 110px;
  gap: 0.6rem;
  align-items: center;
  margin-bottom: 0.7rem;
}
.lbl {
  color: var(--muted);
  font-weight: 500;
  letter-spacing: 0.5px;
}
input[type="number"], input[readonly], select {
  width: 100%;
  padding: 0.7rem 0.9rem;
  background: rgba(6,20,26,0.7);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--ink);
  font-size: 1.05rem;
  transition: 0.2s;
  outline: none;
}
input[readonly]{
  opacity: 0.95;
  border-color: rgba(0,224,255,0.35);
}
input[type="number"]:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 12px rgba(0,224,255,0.3);
}
.actions {
  margin-top: 1.2rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.8rem;
}
button {
  width: 100%;
  padding: 0.9rem;
  background: rgba(0,224,255,0.12);
  border: 1px solid var(--accent);
  border-radius: 40px;
  color: var(--accent);
  font-size: 1.1rem;
  font-weight: bold;
  letter-spacing: 2px;
  cursor: pointer;
  transition: 0.2s;
  backdrop-filter: blur(2px);
}
button:hover {
  background: rgba(0,224,255,0.25);
  box-shadow: 0 0 20px rgba(0,224,255,0.5);
}
.result-box {
  margin-top: 1.2rem;
  padding: 1rem;
  background: rgba(0,224,255,0.05);
  border: 1px solid var(--accent);
  border-radius: 16px;
  color: var(--ink);
}
.result-line {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.35rem 0;
  border-bottom: 1px dotted var(--border);
  gap: 1rem;
}
.result-label { font-weight: 300; color: var(--muted); }
.result-value {
  font-family: 'Courier New', monospace;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--accent);
  text-align: right;
  word-break: break-word;
}
.error {
  color: #ff7c7c;
  padding: 1rem;
  border: 1px solid #ff7c7c;
  border-radius: 12px;
  background: rgba(255,80,80,0.1);
  margin-top: 1rem;
}
.footnote {
  margin-top: 1.2rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.75rem;
}