* {
  box-sizing: border-box;
}

:root {
  --auth-bg: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 45%, #eef1fb 100%);
  --auth-surface: #ffffff;
  --auth-text: #1e293b;
  --auth-muted: #64748b;
  --auth-border: #dbe2f0;
  --auth-primary: #4338ca;
  --auth-primary-light: #6366f1;
  --auth-danger: #dc2626;
}

body.auth-page {
  margin: 0;
  min-height: 100vh;
  font-family: 'Segoe UI', Inter, system-ui, sans-serif;
  background: var(--auth-bg);
  color: var(--auth-text);
}

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

.auth-card {
  width: min(440px, 100%);
  background: var(--auth-surface);
  border: 1px solid rgba(219, 226, 240, 0.95);
  border-radius: 24px;
  padding: 32px;
  box-shadow: 0 18px 45px rgba(30, 41, 59, 0.09);
}

.auth-brand {
  margin-bottom: 24px;
  text-align: center;
}

.auth-brand h1 {
  margin: 0;
  font-size: 2rem;
  color: var(--auth-primary);
}

.auth-brand p {
  margin: 8px 0 0;
  color: var(--auth-muted);
}

.auth-card h2 {
  margin: 0 0 6px;
  font-size: 1.35rem;
  color: var(--auth-text);
}

form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

label {
  font-weight: 600;
  color: var(--auth-text);
}

.form-control,
button {
  width: 100%;
  padding: 14px 16px;
  border-radius: 16px;
  border: 1.5px solid var(--auth-border);
  font-size: 1rem;
  font-family: inherit;
  background-color: #fff;
}

.form-control:focus {
  outline: none;
  border-color: var(--auth-primary-light);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.16);
}

.btn {
  background: linear-gradient(135deg, var(--auth-primary-light), var(--auth-primary));
  color: #fff;
  border: none;
  cursor: pointer;
  font-weight: 700;
  border-radius: 999px;
  padding: 14px 18px;
}

.btn:hover {
  filter: brightness(1.05);
}

.alerts {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 18px;
}

.alert {
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid transparent;
  font-size: 0.95rem;
}

.alert-success {
  background: #ecfdf5;
  color: #166534;
  border-color: #bbf7d0;
}

.alert-danger {
  background: #fef2f2;
  color: #991b1b;
  border-color: #fecaca;
}

.alert-warning {
  background: #fffbeb;
  color: #92400e;
  border-color: #fde68a;
}

.field-error {
  color: var(--auth-danger);
  font-size: 0.9rem;
}