:root {
  --bg: #0b0f1a;
  --panel: #111628;
  --panel-2: #121a2f;
  --text: #e6f0ff;
  --muted: #9fb1d1;
  --primary: #31d4ff;
  --primary-weak: rgba(49, 212, 255, 0.35);
  --accent: #a855f7;
  --danger: #ff4d6d;
  --success: #27e19b;
  --border: #1b2542;
  --glow: 0 0 12px rgba(49, 212, 255, 0.35), inset 0 0 12px rgba(49, 212, 255, 0.08);
}

* {
  box-sizing: border-box;
}
html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(1200px 800px at 80% 20%, #0f1530 0%, var(--bg) 45%, #05070d 100%);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
}

.app-header {
  padding: 24px 16px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(49, 212, 255, 0.08), transparent);
}
.logo {
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: 0.5px;
  color: var(--primary);
  text-shadow: 0 0 10px var(--primary-weak);
}
.subtitle {
  color: var(--muted);
  margin-top: 6px;
}

.container {
  max-width: 1100px;
  margin: 24px auto;
  padding: 0 16px;
}

.card {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  margin-bottom: 18px;
  box-shadow: var(--glow);
  overflow: hidden;
}

.card h2 {
  font-size: 1.1rem;
  margin: 0 0 12px 0;
  color: #d2e7ff;
  letter-spacing: 0.3px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
}

.field-group label {
  font-size: 0.9rem;
  color: #c4d8f9;
}

.field-group small {
  color: var(--muted);
}

.input-suffix {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.input-suffix input {
  flex: 1 1 140px;
}
.input-suffix select {
  flex: 0 0 120px;
}

input, select, .btn {
  background: #0d1325;
  color: var(--text);
  border: 1px solid #1c284c;
  border-radius: 10px;
  padding: 10px 12px;
  outline: none;
  transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.05s ease;
  width: 100%;
}

input:focus, select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-weak);
}

.results {
  margin-top: 8px;
}

.result-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.02);
  min-width: 0;
}

.label {
  color: var(--muted);
  font-size: 0.85rem;
}

.value {
  margin-top: 6px;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.2px;
  color: #eaf6ff;
  word-break: break-word;
}

.actions {
  display: flex;
  gap: 12px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.btn {
  cursor: pointer;
  border: 1px solid #23406b;
  flex: 1 1 auto;
}
.btn:hover {
  box-shadow: 0 0 0 3px var(--primary-weak);
  transform: translateY(-1px);
}
.btn.primary {
  background: linear-gradient(180deg, rgba(49, 212, 255, 0.12), rgba(49, 212, 255, 0.05));
  border-color: var(--primary);
  color: #dff7ff;
}
.btn.primary:hover {
  box-shadow: 0 0 18px rgba(49, 212, 255, 0.35);
}

.app-footer {
  border-top: 1px solid var(--border);
  margin-top: 18px;
  padding: 16px;
  color: var(--muted);
  text-align: center;
  background: linear-gradient(180deg, transparent, rgba(168, 85, 247, 0.06));
}

/* Responsive tweaks */
@media (max-width: 600px) {
  .input-suffix {
    flex-direction: column;
  }
  .input-suffix input,
  .input-suffix select {
    width: 100%;
  }
  .grid {
    grid-template-columns: 1fr;
  }
  .result-item {
    font-size: 0.95rem;
  }
}