:root {
  color-scheme: dark;
  --ink: #eef7f8;
  --muted: #8edbd2;
  --line: #25465a;
  --surface: #101f2d;
  --field: #0b141d;
  --accent: #21c7b7;
  --accent-strong: #69e3d8;
  --accent-ink: #06211e;
  --danger: #ff8a78;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 18% 18%, rgba(33, 199, 183, 0.16), transparent 30%),
    linear-gradient(145deg, #05080c 0%, #09121a 44%, #0b1017 100%);
}

.shell {
  width: min(100% - 32px, 880px);
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  place-items: center;
  padding: 48px 0;
}

.panel {
  width: 100%;
  background: linear-gradient(160deg, rgba(16, 31, 45, 0.96), rgba(12, 22, 32, 0.98));
  border: 1px solid rgba(72, 126, 150, 0.38);
  border-radius: 8px;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.46);
  padding: clamp(28px, 6vw, 56px);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  max-width: 720px;
  margin: 0 0 32px;
  color: var(--ink);
  font-size: clamp(2.2rem, 8vw, 5rem);
  line-height: 0.96;
  letter-spacing: 0;
}

.form,
.result-block {
  display: grid;
  gap: 10px;
}

.result-block {
  margin-top: 22px;
}

label {
  color: var(--accent-strong);
  font-size: 0.95rem;
  font-weight: 700;
}

.input-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

input {
  min-width: 0;
  width: 100%;
  height: 54px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field);
  color: var(--ink);
  padding: 0 16px;
  font: inherit;
}

input::placeholder {
  color: #738896;
}

input:focus {
  border-color: var(--accent);
  outline: 3px solid rgba(33, 199, 183, 0.2);
}

button {
  height: 54px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-ink);
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  padding: 0 24px;
  transition: transform 120ms ease, background 120ms ease;
}

button:hover:not(:disabled) {
  background: var(--accent-strong);
  transform: translateY(-1px);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.status {
  min-height: 24px;
  margin: 18px 0 0;
  color: var(--accent-strong);
  font-weight: 650;
}

.status.error {
  color: var(--danger);
}

@media (max-width: 620px) {
  .shell {
    width: min(100% - 20px, 880px);
    padding: 20px 0;
  }

  .input-row {
    grid-template-columns: 1fr;
  }

  button {
    width: 100%;
  }
}