:root {
  --page-bg: #f3f6ff;
  --ink: #1f2937;
  --ink-muted: #5b6472;
  --card-bg: #ffffff;
  --card-border: #d8deeb;
  --accent: #1d4ed8;
  --accent-hover: #1e40af;
  --danger: #b91c1c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 18%, rgba(37, 99, 235, 0.22), transparent 38%),
    radial-gradient(circle at 88% 72%, rgba(16, 185, 129, 0.2), transparent 36%),
    linear-gradient(160deg, #eef2ff 0%, var(--page-bg) 42%, #f8fafc 100%);
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
}

.login-card {
  width: min(420px, 100%);
  padding: 26px;
  background: color-mix(in srgb, var(--card-bg) 92%, #e0ebff 8%);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  box-shadow:
    0 18px 40px rgba(17, 24, 39, 0.12),
    0 2px 8px rgba(17, 24, 39, 0.08);
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: 30px;
  line-height: 1.1;
}

.intro {
  margin: 10px 0 18px;
  color: var(--ink-muted);
  font-size: 14px;
}

.login-form label {
  display: block;
  margin: 12px 0 6px;
  font-size: 14px;
  font-weight: 600;
}

.login-form input,
.login-form button {
  width: 100%;
  border-radius: 9px;
  padding: 11px 12px;
  font-size: 14px;
}

.login-form input {
  border: 1px solid #c5ccdc;
  background: #fff;
  color: #111827;
}

.login-form input:focus {
  outline: none;
  border-color: #7ea0ff;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.login-form button {
  margin-top: 14px;
  border: 0;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(140deg, #2563eb 0%, #1d4ed8 100%);
  cursor: pointer;
}

.login-form button:hover {
  background: linear-gradient(140deg, #1d4ed8 0%, #1e40af 100%);
}

.login-form button:disabled {
  opacity: 0.7;
  cursor: progress;
}

.error {
  min-height: 18px;
  margin-top: 10px;
  color: var(--danger);
  font-size: 13px;
}

.hint {
  margin-top: 14px;
  font-size: 12px;
  color: #4b5563;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}