:root {
  color-scheme: light;
  --auth-bg: var(--color-canvas-muted);
  --auth-panel: var(--color-surface-elevated);
  --auth-panel-soft: var(--color-surface);
  --auth-ink: var(--color-text);
  --auth-muted: var(--color-text-soft);
  --auth-border: var(--color-border-strong);
  --auth-border-soft: var(--color-border-subtle);
  --auth-brand: var(--color-brand);
  --auth-brand-strong: var(--color-brand-strong);
  --auth-brand-soft: var(--color-brand-soft);
  --auth-danger: var(--color-danger-text);
  --auth-danger-surface: var(--color-danger-surface);
  --auth-danger-border: var(--color-danger-border);
  --auth-info: var(--color-info-text);
  --auth-info-surface: var(--color-info-surface);
  --auth-info-border: var(--color-info-border);
  --auth-card-radius-xl: 24px;
  --auth-card-shadow-soft: var(--shadow-card-elevated);
  --auth-pill-radius: var(--radius-pill);
  --auth-focus-ring: var(--shadow-focus);
  --auth-strength-track: var(--rd-color-e2e8f0);
  --auth-strength-idle: var(--rd-color-cbd5e1);
  --auth-strength-warn: var(--color-warning-text);
  --auth-strength-info: var(--color-info-text);
  --auth-strength-ok: var(--color-success-text);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body.auth-page {
  margin: 0;
  min-height: 100vh;
  font-family: var(--rd-font-sans);
  background:
    radial-gradient(circle at 0% 0%, var(--color-info-border), transparent 55%),
    radial-gradient(circle at 100% 0%, var(--color-brand-border), transparent 55%),
    linear-gradient(180deg, var(--color-surface-elevated) 0%, var(--color-canvas) 55%, var(--auth-bg) 100%);
  color: var(--auth-ink);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 16px;
}

.auth-page a {
  color: inherit;
  text-decoration: none;
}

.auth-page a:hover {
  text-decoration: underline;
}

.auth-shell {
  width: 100%;
  max-width: 420px;
  position: relative;
}

.auth-shell--wide {
  max-width: 520px;
}

.auth-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  justify-content: center;
  margin-bottom: 18px;
}

.auth-logo img {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  box-shadow: var(--auth-card-shadow-soft);
}

.auth-logo span {
  font-weight: 800;
  letter-spacing: -0.03em;
  font-size: 18px;
}

.auth-card {
  background: var(--auth-panel-soft);
  border-radius: var(--auth-card-radius-xl);
  border: 1px solid var(--auth-border-soft);
  box-shadow: var(--auth-card-shadow-soft);
  padding: 24px 26px 22px;
}

.auth-title {
  margin: 0 0 4px;
  font-size: 24px;
  letter-spacing: -0.03em;
}

.auth-lede {
  margin: 0 0 18px;
  font-size: 14px;
  color: var(--auth-muted);
}

.auth-lede--compact {
  margin-bottom: 12px;
}

.auth-error {
  margin-bottom: 12px;
  padding: 10px 12px;
  border-radius: 12px;
  background: var(--auth-danger-surface);
  border: 1px solid var(--auth-danger-border);
  color: var(--auth-danger);
  font-size: 13px;
  word-break: break-word;
  overflow-wrap: break-word;
}

.auth-error--info {
  background: var(--auth-info-surface);
  border-color: var(--auth-info-border);
  color: var(--auth-info);
}

.auth-page label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin: 10px 0 4px;
  color: var(--auth-ink);
}

.auth-page input[type="text"],
.auth-page input[type="password"],
.auth-page input[type="email"] {
  font-family: inherit;
  transition: border-color 150ms ease, box-shadow 150ms ease, background 150ms ease;
}

.rd-input {
  width: 100%;
  border-radius: var(--auth-pill-radius);
  border: 1px solid var(--auth-border);
  padding: 10px 14px;
  font-size: 15px;
  background: var(--color-surface-muted);
  color: var(--auth-ink);
}

.rd-input-lg {
  padding: 12px 16px;
  font-size: 16px;
}

.rd-input:focus,
.auth-page input[type="email"]:focus,
.auth-page input[type="password"]:focus {
  outline: none;
  border-color: var(--auth-brand);
  box-shadow: var(--auth-focus-ring);
  background: var(--auth-panel);
}

.rd-input.auth-input-error {
  border-color: var(--auth-danger);
  background: var(--auth-danger-surface);
}

.rd-input.auth-input-error:focus {
  border-color: var(--auth-danger);
  box-shadow: 0 0 0 3px var(--auth-danger-border);
  background: var(--auth-panel);
}

.auth-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 10px;
  margin-bottom: 2px;
  font-size: 12.5px;
  color: var(--auth-muted);
}

.auth-remember {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.auth-remember input {
  margin: 0;
}

.rd-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border-radius: var(--auth-pill-radius);
  border: 1px solid transparent;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}

.rd-btn-primary {
  background: linear-gradient(135deg, var(--auth-brand-strong), var(--auth-brand));
  color: var(--color-text-inverse);
  box-shadow: 0 14px 35px var(--color-brand-border);
}

.rd-btn-primary:hover {
  box-shadow: 0 16px 38px var(--color-brand-border);
  transform: translateY(-1px);
  text-decoration: none;
}

.rd-btn-lg {
  width: 100%;
  margin-top: 18px;
}

.auth-btn {
  padding: 11px 16px;
  font-size: 15px;
  font-weight: 700;
  transition: transform 140ms ease, box-shadow 140ms ease;
}

.auth-btn[disabled] {
  opacity: 0.88;
  cursor: wait;
  box-shadow: 0 12px 30px var(--color-brand-border);
}

.auth-meta {
  margin-top: 16px;
  font-size: 12.5px;
  color: var(--auth-muted);
}

.auth-meta--actions {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
}

.auth-meta--flush {
  margin-top: 0;
  margin-bottom: 14px;
}

.auth-meta-tight {
  margin-top: 8px;
}

.auth-meta a {
  font-weight: 500;
}

.auth-support {
  margin-top: 10px;
  font-size: 12px;
  color: var(--auth-muted);
}

.auth-remember-help {
  margin-top: 4px;
  font-size: 11.5px;
  color: var(--auth-muted);
}

.auth-field-error {
  margin-top: 4px;
  font-size: 12px;
  color: var(--auth-danger);
}

.auth-field-errors {
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
}

.auth-field-errors li {
  font-size: 12.5px;
  color: var(--auth-danger);
  margin-top: 4px;
}

.password-guidance {
  margin-top: 12px;
  padding: 14px 14px 12px;
  border-radius: 16px;
  border: 1px solid var(--auth-border-soft);
  background: var(--auth-panel);
}

.password-guidance-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.password-guidance-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.password-strength-state {
  font-size: 12px;
  font-weight: 700;
  color: var(--auth-muted);
}

.password-strength-meter {
  margin-top: 10px;
  height: 8px;
  border-radius: 999px;
  background: var(--auth-strength-track);
  overflow: hidden;
}

.password-strength-fill {
  display: block;
  height: 100%;
  width: 18%;
  border-radius: 999px;
  background: var(--auth-strength-idle);
  transition: width 180ms ease, background 180ms ease;
}

.password-strength-meter[data-level="1"] .password-strength-fill {
  width: 28%;
  background: var(--auth-strength-warn);
}

.password-strength-meter[data-level="2"] .password-strength-fill {
  width: 46%;
  background: var(--auth-strength-warn);
}

.password-strength-meter[data-level="3"] .password-strength-fill {
  width: 64%;
  background: var(--auth-info);
}

.password-strength-meter[data-level="4"] .password-strength-fill {
  width: 82%;
  background: var(--auth-brand);
}

.password-strength-meter[data-level="5"] .password-strength-fill {
  width: 100%;
  background: var(--auth-strength-ok);
}

.password-guidance-copy {
  margin: 10px 0 0;
  font-size: 12.5px;
  color: var(--auth-muted);
  line-height: 1.5;
}

.password-guidance-list {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--auth-muted);
  font-size: 12.5px;
  line-height: 1.55;
}

.password-guidance-list li + li {
  margin-top: 4px;
}

@media (max-width: 480px) {
  .auth-card {
    padding: 22px 18px 20px;
  }
}