.auth-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  position: relative;
  overflow: hidden;
}

.auth-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(135deg, #EEF4FF 0%, #F0F9FF 50%, #FAFBFC 100%);
}
.auth-bg-deco {
  position: absolute;
  top: -50%;
  left: -20%;
  width: 80%;
  height: 200%;
  background: radial-gradient(ellipse at center, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
  animation: floatDeco 20s ease-in-out infinite;
}
.auth-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37, 99, 235, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

@keyframes floatDeco {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(5%, -3%) rotate(2deg); }
}

.auth-container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 960px;
}

.auth-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: center;
  margin-bottom: 32px;
}
.auth-brand .brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--c-brand) 0%, #5B8FFF 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  box-shadow: var(--sh-brand);
}
.auth-brand .brand-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--c-text);
}

.auth-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--c-surface);
  border-radius: var(--r-xl);
  box-shadow: var(--sh-lg);
  overflow: hidden;
  border: 1px solid var(--c-border);
}

.auth-card-left {
  padding: 48px 40px;
  background: linear-gradient(160deg, var(--c-brand) 0%, #4F7CFF 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.auth-card-left::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -30%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 60%);
  pointer-events: none;
}
.auth-card-left::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
  pointer-events: none;
}

.auth-hero {
  position: relative;
  margin-bottom: 40px;
}
.auth-hero h2 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}
.auth-hero p {
  font-size: 14px;
  opacity: 0.85;
  line-height: 1.6;
}

.auth-features {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.af-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.af-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--r-md);
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.af-item h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}
.af-item p {
  font-size: 13px;
  opacity: 0.8;
  line-height: 1.5;
}

.auth-card-right {
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.auth-form-wrap {
  width: 100%;
}

.auth-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}
.auth-subtitle {
  font-size: 14px;
  color: var(--c-text-secondary);
  margin-bottom: 28px;
}
.auth-subtitle a {
  color: var(--c-brand);
  font-weight: 500;
}
.auth-subtitle a:hover { color: var(--c-brand-hover); }

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-row {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}
.form-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--c-text);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.form-link {
  font-size: 13px;
  color: var(--c-brand);
  font-weight: 400;
}
.form-link:hover { color: var(--c-brand-hover); }

.input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.input-icon {
  position: absolute;
  left: 14px;
  font-size: 16px;
  z-index: 1;
  opacity: 0.5;
}
.input-code .input-icon { left: 12px; }

.form-input {
  width: 100%;
  padding: 12px 16px 12px 42px;
  font-size: 14px;
  border: 1px solid var(--c-border);
  border-radius: var(--r-sm);
  background: var(--c-surface);
  color: var(--c-text);
  transition: all var(--t-fast);
  outline: none;
}
.form-input::placeholder {
  color: var(--c-text-tertiary);
}
.form-input:hover {
  border-color: var(--c-border-strong);
}
.form-input:focus {
  border-color: var(--c-brand);
  box-shadow: 0 0 0 3px var(--c-brand-light);
}

.input-toggle {
  position: absolute;
  right: 12px;
  font-size: 16px;
  opacity: 0.5;
  padding: 4px;
  transition: opacity var(--t-fast);
}
.input-toggle:hover { opacity: 0.8; }

.code-btn {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  padding: 7px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--c-brand);
  background: var(--c-brand-light);
  border-radius: var(--r-xs);
  white-space: nowrap;
  transition: all var(--t-fast);
}
.code-btn:hover:not(:disabled) {
  background: var(--c-brand);
  color: #fff;
}
.code-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.checkbox-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
}
.checkbox-wrap input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.checkbox-custom {
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--c-border-strong);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--t-fast);
  flex-shrink: 0;
  background: var(--c-surface);
}
.checkbox-wrap input:checked + .checkbox-custom {
  background: var(--c-brand);
  border-color: var(--c-brand);
}
.checkbox-wrap input:checked + .checkbox-custom::after {
  content: '✓';
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
}
.checkbox-label {
  font-size: 13px;
  color: var(--c-text-secondary);
  line-height: 1.5;
}
.checkbox-label a {
  color: var(--c-brand);
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 8px 0 4px;
}
.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--c-border);
}
.auth-divider span {
  font-size: 12px;
  color: var(--c-text-tertiary);
}

.auth-social {
  display: flex;
  gap: 12px;
}
.social-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  border: 1px solid var(--c-border);
  border-radius: var(--r-sm);
  background: var(--c-surface);
  font-size: 13px;
  font-weight: 500;
  color: var(--c-text-secondary);
  transition: all var(--t-fast);
}
.social-btn:hover {
  border-color: var(--c-brand);
  color: var(--c-brand);
  background: var(--c-brand-light);
}
.social-icon {
  font-size: 18px;
}

.auth-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 28px;
  font-size: 12px;
  color: var(--c-text-tertiary);
}
.auth-footer-links {
  display: flex;
  gap: 16px;
}
.auth-footer-links a {
  color: var(--c-text-tertiary);
  transition: color var(--t-fast);
}
.auth-footer-links a:hover { color: var(--c-brand); }

@media (max-width: 768px) {
  .auth-card {
    grid-template-columns: 1fr;
  }
  .auth-card-left {
    padding: 32px 28px;
    order: 2;
  }
  .auth-card-right {
    padding: 32px 28px;
  }
  .auth-hero { margin-bottom: 24px; }
  .auth-hero h2 { font-size: 22px; }
  .auth-features {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 12px;
  }
  .af-item { flex: 1 1 calc(50% - 6px); }
  .auth-footer {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .auth-body { padding: 12px; }
  .auth-card-left { padding: 24px 20px; }
  .auth-card-right { padding: 24px 20px; }
  .auth-features { flex-direction: column; }
  .af-item { flex: none; }
}