/* ============================================
   用户认证页面样式
   ============================================ */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
    padding: var(--spacing-2xl) var(--spacing-md);
}

.auth-card {
    width: 100%;
    max-width: 450px;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-2xl);
    border: 1px solid var(--border-color);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.auth-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.auth-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.auth-subtitle {
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* 错误提示 */
.auth-errors {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: #fee;
    border: 1px solid #fcc;
    border-radius: var(--radius-md);
}

.error-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: #c33;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.error-item:last-child {
    margin-bottom: 0;
}

.error-icon {
    font-size: 1rem;
}

/* Flash消息 */
.flash-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    font-size: 0.9rem;
}

.flash-success {
    background: #e8f5e9;
    border: 1px solid #4caf50;
    color: #2e7d32;
}

.flash-error {
    background: #ffebee;
    border: 1px solid #f44336;
    color: #c62828;
}

.flash-info {
    background: #e3f2fd;
    border: 1px solid #2196f3;
    color: #1565c0;
}

.flash-icon {
    font-size: 1.1rem;
}

/* 表单样式 */
.auth-form {
    margin-top: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-color);
    color: var(--text-primary);
    transition: all var(--transition-fast);
    box-sizing: border-box;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: white;
    box-shadow: 0 0 0 3px rgba(26, 54, 93, 0.1);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-hint {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    font-size: 0.9rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
    color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.forgot-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.9rem;
}

.forgot-link:hover {
    text-decoration: underline;
}

/* 按钮 */
.auth-btn {
    width: 100%;
    padding: 14px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: var(--spacing-lg);
}

.auth-btn-primary {
    background: var(--primary-color);
    color: white;
}

.auth-btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.auth-btn-primary:active {
    transform: translateY(0);
}

/* 切换链接 */
.auth-switch {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.auth-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    margin-left: var(--spacing-xs);
}

.auth-link:hover {
    text-decoration: underline;
}

/* 页脚 */
.auth-footer {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-light);
    text-align: center;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.back-link:hover {
    color: var(--primary-color);
}

/* 认证页面响应式 */
@media (max-width: 768px) {
    .auth-container {
        padding: var(--spacing-lg) var(--spacing-md);
        min-height: auto;
    }
    
    .auth-card {
        padding: var(--spacing-xl);
        border-radius: var(--radius-lg);
    }
    
    .auth-icon {
        font-size: 2.5rem;
    }
    
    .auth-title {
        font-size: 1.5rem;
    }
    
    .form-input {
        padding: 10px 14px;
        font-size: 0.95rem;
    }
}