:root {
  --bg: #edf2f7;
  --ink: #132235;
  --muted: #55657a;
  --card: #ffffff;
  --line: #d2dbe6;
  --ok: #1f8f4e;
  --error: #b42318;
  --accent: #005f73;
  --accent-2: #0a9396;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 0% 0%, #dceeff 0, transparent 40%),
    radial-gradient(circle at 100% 30%, #dbf6ef 0, transparent 45%),
    var(--bg);
}

.app-shell {
  width: min(980px, 100% - 2rem);
  margin: 2rem auto 3rem;
  display: grid;
  gap: 1rem;
}

.hero {
  border-radius: 18px;
  padding: 1.6rem;
  background: linear-gradient(132deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #fff;
  box-shadow: 0 16px 40px rgba(0, 65, 75, 0.2);
}

.hero h1 {
  margin: 0.3rem 0 0.8rem;
  font-size: clamp(1.4rem, 2.7vw, 2.2rem);
}

.hero p {
  margin: 0;
  max-width: 70ch;
}

.eyebrow {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.9;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
}

.card h2 {
  margin-top: 0;
  margin-bottom: 0.75rem;
}

.stack {
  display: grid;
  gap: 0.7rem;
}

label {
  display: grid;
  gap: 0.3rem;
  font-size: 0.95rem;
}

input,
select,
textarea,
button {
  font: inherit;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.6rem 0.7rem;
  background: #fff;
}

button {
  border: none;
  border-radius: 10px;
  padding: 0.66rem 0.9rem;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}

button[disabled] {
  opacity: 0.6;
  cursor: wait;
}

code {
  background: #f0f4f8;
  border: 1px solid #d7e1ea;
  padding: 0.1rem 0.3rem;
  border-radius: 6px;
}

.split {
  display: grid;
  gap: 0.7rem;
  grid-template-columns: 1fr 1fr;
}

.split-3 {
  grid-template-columns: repeat(3, 1fr);
}

.status {
  margin: 0.8rem 0 0;
  color: var(--muted);
}

.status[data-tone="ok"] {
  color: var(--ok);
}

.status[data-tone="error"] {
  color: var(--error);
}

.output {
  margin-top: 0.8rem;
  background: #0c1726;
  color: #e6effc;
  padding: 0.8rem;
  border-radius: 10px;
  overflow: auto;
  font-size: 0.85rem;
}

.hidden {
  display: none;
}

@media (max-width: 800px) {
  .split,
  .split-3 {
    grid-template-columns: 1fr;
  }

  .app-shell {
    width: min(980px, 100% - 1rem);
    margin-top: 1rem;
  }
}