:root {
  color-scheme: dark;
  --bg: #0b1020;
  --card: rgba(18, 25, 48, 0.92);
  --line: rgba(255, 255, 255, 0.08);
  --text: #eef2ff;
  --muted: #9aa4c7;
  --accent: #86efac;
  --accent-2: #60a5fa;
  --danger: #fda4af;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, system-ui, sans-serif;
  background:
    radial-gradient(circle at top, rgba(96,165,250,0.18), transparent 30%),
    radial-gradient(circle at bottom right, rgba(134,239,172,0.12), transparent 35%),
    var(--bg);
  color: var(--text);
}
.shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.card {
  width: min(100%, 720px);
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--card);
  backdrop-filter: blur(20px);
  box-shadow: 0 20px 80px rgba(0,0,0,0.35);
}
.eyebrow {
  color: var(--accent);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
h1 {
  margin: 0;
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.02;
}
.lede {
  color: var(--muted);
  font-size: 18px;
  margin: 14px 0 28px;
}
.form, .result-row {
  display: flex;
  gap: 12px;
}
input {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.03);
  color: var(--text);
  border-radius: 16px;
  padding: 16px 18px;
  font-size: 16px;
  outline: none;
}
input:focus {
  border-color: rgba(96,165,250,0.7);
  box-shadow: 0 0 0 4px rgba(96,165,250,0.12);
}
button {
  border: 0;
  border-radius: 16px;
  padding: 0 22px;
  font-size: 16px;
  font-weight: 600;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #08111f;
  cursor: pointer;
  white-space: nowrap;
}
button.ghost {
  background: rgba(255,255,255,0.06);
  color: var(--text);
  border: 1px solid var(--line);
}
.notice, .result {
  margin-top: 18px;
  border-radius: 18px;
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.03);
}
.notice.error { color: var(--danger); }
.result span {
  display: block;
  color: var(--muted);
  margin-bottom: 10px;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}
.compact { width: min(100%, 560px); }
.stack-form {
  display: grid;
  gap: 12px;
}
.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}
.panel {
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.03);
  border-radius: 20px;
  padding: 18px;
}
.panel span {
  display: block;
  color: var(--muted);
  margin-bottom: 8px;
}
.panel strong {
  display: block;
  font-size: 20px;
  margin-bottom: 8px;
}
.panel p {
  margin: 0;
  color: var(--muted);
}
@media (max-width: 640px) {
  .card { padding: 24px; border-radius: 24px; }
  .form, .result-row, .topbar { flex-direction: column; }
  .dashboard-grid { grid-template-columns: 1fr; }
  button { min-height: 54px; }
}