body {
  margin: 0;
  min-height: 100vh;
  background: #050710;
  color: #f8fafc;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1rem, 5vw, 3rem);
}

.shell {
  width: min(560px, 100%);
}

header h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 2.8rem);
}

header p {
  margin-top: 0.3rem;
  color: #9aa8c8;
}

.panel {
  margin-top: 1.5rem;
  background: rgba(13, 18, 35, 0.92);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 28px;
  padding: clamp(1.2rem, 3vw, 2rem);
  box-shadow: 0 40px 60px rgba(2, 6, 23, 0.5);
}

label {
  display: block;
  margin-bottom: 0.8rem;
  font-weight: 600;
}

input {
  width: 100%;
  border-radius: 18px;
  border: 1px solid rgba(148, 163, 184, 0.3);
  padding: 0.8rem 1rem;
  background: rgba(8, 12, 28, 0.8);
  color: #f8fafc;
  margin-top: 0.5rem;
}

button {
  width: 100%;
  border: none;
  border-radius: 20px;
  padding: 0.9rem;
  margin-top: 0.6rem;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  background: linear-gradient(135deg, #06b6d4, #14b8a6);
  color: #04111f;
}

.result {
  margin-top: 1.5rem;
  padding: 1.2rem;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.result h2 {
  margin: 0 0 1rem 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
}

.grid div {
  padding: 1rem;
  border-radius: 20px;
  background: rgba(3, 11, 26, 0.9);
  text-align: center;
}

.grid span {
  display: block;
  font-size: 2rem;
  font-weight: 700;
}

.grid small {
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  color: #9aa8c8;
}

@media (max-width: 600px) {
  body {
    padding: 1rem;
  }
  input, button {
    font-size: 1rem;
  }
}