:root {
  color-scheme: light;
  --bg: #eef1f4;
  --surface: #ffffff;
  --surface-soft: #f7f8fa;
  --text: #17202a;
  --muted: #657384;
  --line: #d9dee5;
  --blue: #2563eb;
  --green: #0f766e;
  --red: #b42318;
  --shadow: 0 18px 48px rgba(31, 42, 55, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    linear-gradient(135deg, rgba(37, 99, 235, 0.10), transparent 32%),
    linear-gradient(315deg, rgba(15, 118, 110, 0.12), transparent 34%),
    var(--bg);
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-panel {
  width: min(460px, 100%);
  display: grid;
  gap: 18px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow);
  animation: panel-enter 220ms ease-out;
}

h1,
p {
  margin: 0;
}

h1 {
  font-size: 26px;
  line-height: 1.1;
}

p,
label,
.passkey-box span {
  color: var(--muted);
  font-size: 14px;
}

.login-form {
  display: grid;
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
}

input,
button {
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
}

input {
  width: 100%;
  padding: 0 12px;
  color: var(--text);
  background: var(--surface);
}

button {
  color: #ffffff;
  background: var(--blue);
  border-color: var(--blue);
  cursor: pointer;
}

button:hover {
  filter: brightness(0.96);
}

.passkey-box,
.status-line {
  border-radius: 8px;
  background: var(--surface-soft);
}

.passkey-box {
  display: grid;
  gap: 6px;
  padding: 12px;
  border: 1px solid var(--line);
}

.passkey-box strong {
  font-size: 14px;
}

.status-line {
  min-height: 36px;
  padding: 10px 12px;
  font-size: 13px;
}

.status-line:empty {
  display: none;
}

.status-line.error {
  color: var(--red);
  background: #fff1f0;
}

.status-line.ok {
  color: var(--green);
  background: #e8f7f4;
}

@keyframes panel-enter {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}