:root {
  --bg: #07090f;
  --bg2: #0b1020;
  --txt: #e8f0ff;
  --muted: #8aa3c7;
  --accent: #4ea8ff;
  --accent2: #00d1ff;
  --glass: rgba(255, 255, 255, 0.05);
  --border: rgba(255, 255, 255, 0.12);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}

body {
  margin: 0;
  font-family: "Inter", sans-serif;
  background: linear-gradient(180deg, var(--bg), var(--bg2));
  color: var(--txt);
}

.topbar {
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border);
  background: var(--glass);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
}

.brand { font-weight: 600; font-size: 1.25rem; }
.brand span { color: var(--accent); }

.container {
  max-width: 600px;
  margin: 3rem auto;
  padding: 0 1rem;
}

h1 { text-align: center; margin-bottom: 1.5rem; }

form.glass {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: var(--glass);
  padding: 1.5rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

label { display: flex; flex-direction: column; font-size: 0.9rem; }

input, select {
  margin-top: 0.5rem;
  padding: 0.6rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #0e1522;
  color: var(--txt);
}

.btn.primary {
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border: none;
  color: white;
  padding: 0.8rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
}
.btn.primary:hover { opacity: 0.9; }

.result {
  margin-top: 2rem;
  padding: 1.5rem;
  border-radius: 12px;
  border: 1px solid var(--border);
}
.hidden { display: none; }

.footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.9rem;
  color: var(--muted);
}