:root {
  --bg-1: #071119;
  --bg-2: #142433;
  --ink: #ecf4fb;
  --muted: #9eb1c2;
  --brand: #16c6a5;
  --warn: #ff7e58;
  --card: rgba(10, 24, 36, 0.88);
  --stroke: rgba(236, 244, 251, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
  background:
    radial-gradient(1000px 700px at 8% -15%, #1f4058 0%, transparent 60%),
    radial-gradient(800px 560px at 92% -15%, #244140 0%, transparent 55%),
    linear-gradient(145deg, var(--bg-1), var(--bg-2));
  min-height: 100vh;
}

.shell {
  width: min(1150px, 94vw);
  margin: 24px auto 40px;
}

.hero {
  padding: 12px 4px 22px;
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  letter-spacing: 0.01em;
}

h2 {
  margin: 0 0 14px;
  font-size: 1.02rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #c8d9e8;
}

p {
  margin: 0;
  color: var(--muted);
}

.card {
  background: var(--card);
  border: 1px solid var(--stroke);
  border-radius: 14px;
  padding: 14px;
  margin-bottom: 14px;
  backdrop-filter: blur(2px);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 14px;
}

.row {
  display: grid;
  grid-template-columns: 120px 1fr;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.row > button {
  grid-column: 1 / -1;
}

label {
  font-size: 0.9rem;
  color: #b8cad8;
}

input,
select,
button {
  border-radius: 10px;
  border: 1px solid var(--stroke);
  background: rgba(6, 17, 27, 0.85);
  color: var(--ink);
  padding: 10px 12px;
  font: inherit;
}

button {
  cursor: pointer;
  font-weight: 700;
  background: linear-gradient(135deg, #1b4f67, #16687a);
}

button:hover {
  filter: brightness(1.08);
}

button.secondary {
  background: linear-gradient(135deg, #344f63, #2b4457);
}

button.danger {
  background: linear-gradient(135deg, #7a2b2b, #a04332);
}

pre {
  margin: 10px 0 0;
  max-height: 220px;
  overflow: auto;
  background: rgba(4, 11, 18, 0.95);
  border: 1px solid var(--stroke);
  border-radius: 10px;
  padding: 10px;
}

.mono {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.84rem;
}

@media (max-width: 640px) {
  .row {
    grid-template-columns: 1fr;
  }
}