:root {
  color-scheme: light dark;
  --canvas: #ffffff;
  --surface: #f9f8f7;
  --text: #2c2c2b;
  --muted: #7d7a75;
  --border: #e6e5e3;
  --accent: #2783de;
  --accent-soft: #e5f2fc;
  --error: #e56458;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, var(--accent-soft), transparent 34%), var(--canvas);
  color: var(--text);
  min-height: 100vh;
}
.app-shell {
  width: min(100%, 760px);
  margin: 0 auto;
  padding: 24px;
}
.card {
  background: color-mix(in srgb, var(--surface) 92%, white);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 1px 2px rgba(0,0,0,.05), 0 4px 12px rgba(0,0,0,.04);
}
.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
}
h1 {
  margin: 0 0 8px;
  font-size: clamp(28px, 8vw, 44px);
  line-height: 1.05;
}
.helper, .status {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.5;
}
.status { min-height: 24px; margin: 16px 0; }
.status.error { color: var(--error); }
.blank-form {
  display: grid;
  gap: 16px;
  margin: 20px 0;
}
.blank-field label {
  display: block;
  margin-bottom: 8px;
  font-weight: 650;
}
.blank-field input {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  font: inherit;
  background: var(--canvas);
  color: var(--text);
}
.blank-field input:focus, .submit:focus {
  outline: 3px solid color-mix(in srgb, var(--accent) 35%, transparent);
  border-color: var(--accent);
}
.submit {
  width: 100%;
  min-height: 52px;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: white;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.submit:disabled { opacity: .45; cursor: not-allowed; }
@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #191919;
    --surface: #202020;
    --text: #ffffff;
    --muted: rgba(255,255,255,.65);
    --border: rgba(255,255,255,.2);
    --accent: #5e9fe8;
    --accent-soft: rgba(94,159,232,.12);
  }
}