:root {
  color-scheme: light;
  --bg: #f4f1ff;
  --panel: #ffffff;
  --text: #17113a;
  --muted: #6d6682;
  --border: #ddd6f3;
  --primary: #6846df;
  --primary-dark: #5233c0;
  --error-bg: #fff0f0;
  --error-text: #8b1e1e;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(104,70,223,.12), transparent 34rem),
    var(--bg);
}

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

.auth-card {
  width: min(100%, 470px);
  background: var(--panel);
  border: 1px solid rgba(104,70,223,.12);
  border-radius: 22px;
  padding: 32px;
  box-shadow: 0 22px 60px rgba(31, 20, 75, .12);
}

.auth-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.auth-symbol {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: var(--primary);
  color: #fff;
  font-size: 22px;
}

.auth-brand strong,
.auth-brand small { display: block; }

.auth-brand small {
  margin-top: 3px;
  color: var(--muted);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
}

.auth-intro {
  margin: 0 0 24px;
  color: var(--muted);
  line-height: 1.55;
}

.auth-field {
  display: block;
  margin-top: 17px;
  font-weight: 700;
}

.auth-field input {
  width: 100%;
  margin-top: 7px;
  padding: 13px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  font: inherit;
  color: var(--text);
  background: #fff;
}

.auth-field input:focus {
  outline: 3px solid rgba(104,70,223,.15);
  border-color: var(--primary);
}

.auth-check {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin-top: 18px;
  color: var(--muted);
  line-height: 1.45;
}

.auth-button {
  width: 100%;
  margin-top: 22px;
  padding: 13px 18px;
  border: 0;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.auth-button:hover { background: var(--primary-dark); }
.auth-button:disabled { opacity: .65; cursor: wait; }

.auth-message {
  display: none;
  margin: 18px 0 0;
  padding: 12px 14px;
  border-radius: 11px;
  background: var(--error-bg);
  color: var(--error-text);
  line-height: 1.45;
}

.auth-message.show { display: block; }

.auth-footer {
  margin: 22px 0 0;
  text-align: center;
  color: var(--muted);
}

.auth-footer a {
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
}

@media (max-width: 520px) {
  .auth-card { padding: 24px 20px; border-radius: 18px; }
}
.auth-message.success {
  background: #ecfdf3;
  color: #166534;
  border: 1px solid #bbf7d0;
}