:root {
  --brand: #284898;
  --accent: #088888;
  --ink: #1b1f2a;
  --quiet: #5b6272;
  --line: #d6dae3;
  --danger: #b3261e;
  --surface: #ffffff;
  --page: #f4f6fb;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px 16px;
  background: var(--page);
  color: var(--ink);
  font-family: system-ui, 'Segoe UI', Tahoma, sans-serif;
  font-size: 17px;
  line-height: 1.6;
}

.card {
  width: min(100%, 26rem);
  padding: 32px 24px;
  border-radius: 20px;
  background: var(--surface);
  box-shadow: 0 1px 2px rgb(0 0 0 / 6%);
  text-align: center;
}

.logo {
  display: block;
  margin: 0 auto 8px;
  border-radius: 22px;
}

h1 {
  margin: 0 0 4px;
  color: var(--brand);
  font-size: 1.8rem;
}

.lead,
.hint {
  margin: 0 0 20px;
  color: var(--quiet);
}

.hint {
  margin: 16px 0 0;
  font-size: 0.95rem;
}

form {
  display: grid;
  gap: 8px;
  text-align: start;
}

label {
  font-weight: 600;
}

input {
  width: 100%;
  min-height: 52px;
  padding: 10px 14px;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  font: inherit;
  font-size: 1.1rem;
  text-align: left;
}

input:focus {
  outline: 3px solid color-mix(in srgb, var(--accent) 35%, transparent);
  border-color: var(--accent);
}

.error {
  min-height: 1.6em;
  margin: 0;
  color: var(--danger);
  font-size: 0.95rem;
}

button {
  min-height: 52px;
  border: 0;
  border-radius: 12px;
  background: var(--brand);
  color: #ffffff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:disabled {
  opacity: 0.6;
}